The Afterschool Special Happy Ending music is back as Maddie is declared top of the pyramid for beating kids who were three and four years older than she. And speaking of Maddie, only she, Chloe, Nia and Kendall will be in the group dance, which is a jazz routine called Bad Girls.
The Thundermans are a family of superheroes who are trying to live a normal life in Hiddenville. The two oldest children, twins Phoebe and Max Thunderman, must babysit their younger siblings, Nora and Billy, while their parents, Hank and Barb, go out to dinner. Phoebe disobeys her parents orders when she invites her best friend Cherry over and accidentally exposes the family's superpower abilities. As for Max, he uses Nora and Billy to work on evil tasks in his bedroom lair. Hank and Barb are enjoying dinner until they overhear that a party entertainer who was to be Thunderman at a child's birthday party could not perform. Hank does not want to disappoint the child so he decides to wear the Thunderman supersuit without exposing his true super powers.
Just as Hank reminds the children about no non-superheroes in the house, Max plans to sabotage dinner when Phoebe has to invite her crush, Cole Campbell, and his rich family over. However, just as Max's plans are in play, his crush, Tara, also arrives with the family. This forces Phoebe and Max to work together to keep the night from turning into a complete disaster, while they also deal with Nora, Billy, and their parents, who are embarrassing them and their guests.
Both Phoebe and Max want new phones but their parents refuse because the phones are expensive. So, Phoebe and Max interview for a job at Mrs. Wong's. Phoebe and Tyler get are hired but Tyler is quickly fired after sneezing. So, Max gets Tyler's job forcing the Thunder Twins to learn to work together in harmony. Mrs. Wong fires them on the first day for ruining everything and failing to work together, but they convince her to hire them back. While Mrs. Wong is away, they accept a huge order of pizzas so that they can make all the money they need in one day. The twins can't keep up with the machine's speed and are forced to slow it down by blocking it with pizza. The machine builds pressure and explodes covering Mrs. Wong with pizza dough. She fires them again. Back at home, they realize that Nora and Billy had bought phones after betting against Barb in sports-stacking. The Thunder Twins blackmail their little siblings to give them the phones but Nora zaps and melts the phones with her laser eyes.
It's Hank and Barb's anniversary, and Hank has bought Barb a new car, which is red, as a surprise birthday gift. Phoebe finds out about the car which is a problem because she is not good at keeping such secrets. Hank tries his best to make sure Phoebe won't tell anyone. While the parents are away, Phoebe accidentally tells Max, Billy and Nora about the car. They get inside to check it out but accidentally get it dented. Now, they must fix the car before their parents return home. They ask Cousin Blobbin to help fix it but he says he will do it on condition that Hank says he loves him since he had failed to say it earlier. Max shows Phoebe a phone app he uses to edit words together that they could use to make it sound as if Hank said "I love you, Blobbin." All they need to do is sneak into the restaurant and make sure Hank says those words in any order. It doesn't go as smooth as planned but after finally getting the words, they replay them to Blobbin who buys a new car to replace the dented one. Hank figures out what happened since the new car is red, but he doesn't get mad at Phoebe because Barb loves the new car and reveals that she wouldn't have liked the red car.
Phoebe has an obsessive crush over Dylan. After figuring out that Dylan takes care of his little brother, Phoebe lies to him that she takes care of her little brother and sister too. So, they agree to meet at the park for their babies' playdate. Meanwhile, Max gets a safe from Dark Mayhem and forces Billy and Nora to help open it with their powers. Phoebe uses telekinesis to pull Nora and Billy from Max's Lair and force them to go to the park with her. Max comes to the park and takes the kids back so that they can open the safe. He mistakenly grabs Rusty's stroller, mistaking it for Nora's Baby Lulu stroller. Phoebe discovers that Max took the real baby and left them with Baby Lulu. Max is forced to take care of baby Rusty as he tries to figure out a way to go past his parents. At the park, Phoebe keeps Dylan away from the baby while waiting for Max to return the real baby. Dylan gets suspicious and Phoebe is about to tell him the truth when Max, Nora and Billy arrive just in time. They swap the babies. Dylan grabs Rusty and leaves angrily, refusing to ever go on a date with Phoebe again.
Phoebe and Max want to sneak to Winnie Lee's unsupervised party but Barb and Hank bust them. So, Phoebe asks Max to use his BrainMelt-3000 gadget to wipe their parents' adult memory in order to remind them how it is being a teen. They successfully make Barb and Hank think they're still teens. The twins leave for Winnie Lee's party but on their way, they learn that the party has moved to the Thundermans house - Barb and Hank are throwing the party. It's fun at first but Max and Phoebe quickly realize things are getting out of control and they can easily get exposed. They want to reverse the effects of the BrainMelt so that their parents can end the party but the BrainMelt isn't fully charged. So, they trick Hank and Barb into kissing, triggering electric sparks from Barb just like the first time Hank and Barb kissed. They use Barb's electricity to recharge the BrainMelt. After being turned back to normal, Hank and Barb end the party and punish the twins.
Phoebe is excited to meet Quinn, Link's best friend from Metroburg. She thinks Quinn is a boy but is shocked to find out that Quinn is a girl. She learns that Quinn is the daughter of bug villains that Hank and Barb defeated. Link insists that Quinn is not a villain like her parents and that she doesn't even have bug powers. When left alone with Phoebe, Quinn makes it clear that she likes Link and will do anything she can to get rid of Phoebe. This worries Phoebe but she fails to tell Link because Link wants her to get along with Quinn. Phoebe tricks Max into joining her, Link and Quinn for a double date so that Max can get Quinn to act mean to Phoebe in front of Link. Max instead falls for Quinn and tries to get her to date him but she just wants Link. During the double-date, Quinn and Phoebe keep fighting until Phoebe can't take anymore. Phoebe brings mangoes to Quinn since bug villains can't resist mangoes. Quinn morphs into a bug, making Phoebe realize that she is still a bug villain. Phoebe arrests Quinn and reports her to the Hero League, and Link apologizes for not believing her.
Meanwhile, Billy and Nora are excited at being roommates when Hank and Barb move Chloe into Billy's old room, but Chloe is afraid of sleeping alone and the twins hear noises at night, thinking there's a monster. When the parents don't believe them, they set up a trap and the noises turn out to be coming from Chloe's stuffed toy, revealing she had been teleporting under their beds because of her fear. Chloe decides to sleep with Hank and Barb for a while longer while the twins keep their shared room.
When Cherry's laptop gets stolen, Phoebe offers to help look for it. Meanwhile, Max ditches his band after getting advice from Dr. Colosso to look for more shady characters to hang out with in order to get material for his evil chronicle. He notices a group of girls holding Cherry's laptop. He joins the gang and starts protecting the bad girls from Phoebe. Max and the bad girls sneak into the school talent show for their next heist. Max helps them steal his band's equipment. He finds a new guitar strap and a note from Oyster, Wolfgang and Gideon which makes him realize that he cares about them too. However, when he tries to stop the girls from stealing the equipment, they beat him up and leave him on the floor. Phoebe and Cherry suspect that the thief will be at the school talent show. So, they try to get in by pretending to perform a magic show but Principal Bradford refuses to let them in. Phoebe enters backstage through the ceiling and finds Max having been beaten up by the girls. She helps Max up and they go after the girls together. After a huge, awkward fight, the twins defeat the bad girls and bring back Cherry's laptop. Max rejoins his friends in the band.
Max and Phoebe are unable to defeat a video game villain on a video game developed by Cybron James, whose villains are impossible to beat. Meanwhile, Nora and Billy want to play the game and spend time with the twins but the twins push them away. The twins get tickets to GamerFest where Cybron James will be launching his new video game, but they're forced to take Billy and Nora with them. So, the Thunder Twins ditch their little siblings at GamerFest. Nora and Billy are taken by twins Matt and Fefe, doppelgangers of Max and Phoebe. Meanwhile, Phoebe and Max are unable to get inside to talk to Cybron because they need to have a kid under 13. Nora and Billy get the wristbands for Fefe and Matt instead. The twins disguise themselves as employees in order to get inside. Mistaking Phoebe for an employee, Fefe and Matt reveal their plans to trick Nora and Billy into playing a rigged, live action version of Cybron's new game, Spitballs. While Max is pitching his video game character to Cybron, he discovers that Cybron wants to humiliate Nora and Billy in the game. So, Max goes to help Phoebe save the kids and defeat the Spitballs game. Phoebe and Max apologize for ditching Billy and Nora and promise to spare more time for them.
When Nora and Billy get their mom's tablet confiscated by their teacher, they enlist Phoebe and Max to help them get the tablet back without their parents finding out. Phoebe uses The Animalizer to turn Cousin Blobbin's dog into a woman, pretending to be their mom. However, things go awry when they feed her meat. 59ce067264