Sue's excitement about moving into the dorm to start college is tempered when she accidentally burns her hair and must cut it short. Axl isn't interested in helping with Sue's move. Frankie discovers she's not sad about Sue moving out of the house while Mike overwhelms Sue with financial and safety guidelines. Brick is clueless when Cindy tells him she wants to take their relationship to the next level.
Frankie is shocked when Mike trades in his flannel for a Hawaiian shirt. Sue accidentally tells Devin that Axl loves her, leading Devin to question their relationship. Brick gets overambitious while cleaning the bathroom.
Mike surprises Frankie when he wants to be involved in his brother's crazy business scheme; Axl goes to extreme measures to prove he can handle Mike's new motorcycle; and Sue begins living in her car to avoid her horrible roommate.
Frankie asks Reverend TimTom to find out why Mike is being distant; and Sue invites Brick to visit her at college, but she loses him after running into the handsome Abercrombie guy. Meanwhile, Axl and Hutch complain to the city about an ant infestation.
Sue discovers that she's too poor to keep up with her new roommate's spending habits, Axl discovers that befriending the boss isn't what it's cracked up to be, and Brick could lose his only two friends when he becomes a director.
While the Hecks take Brick to his first movie in a theater, Mike and Frankie fight over a conversation with friends, Sue runs into an old crush who has some surprising news, and Axl discovers that he shared an awkward moment with a friend.
After Brick attends a Bar Mitzvah and questions when he'll officially become a man, Mike attempts to help him become more responsible in his quest to manhood. Meanwhile, Sue exudes a little too much enthusiasm as she tries to flirt and find herself a boyfriend, and Axl and Hutch find themselves a new home in the form of a Winnebago.
Frankie's excited to take care of Sue and Axl after they both have their wisdom teeth removed; and Brick lays down new house rules for his siblings while they're back home. Meanwhile, Mike learns the diaper business was Rusty's ex-wife's idea and becomes furious when he finds out she may be entitled to all their profits.
Sue develops a huge crush on one of her college professors and goes to extremes to get him to notice her, and Frankie and Mike agree to meet Brick's girlfriend Cindy's parents, who end up being just as quirky as their daughter.
Mike is upset that Axl is considering quitting football and losing his scholarship, Frankie does not like Sue's new activist boyfriend, and Brick struggles with the responsibilities of being an online product reviewer.
Frankie's plans to have a peaceful backyard lanai are ruined by her new neighbors' loud children. Axl and Hutch begin a new food business on campus. Sue and Lexie make plans for next year after they win the dorm lottery.
Frankie tells the family that they don't need to do anything special for her this Mother's Day, but she decides to have everyone pull a family member's name from a hat and do a nice deed for that person after a kind stranger asks her to pay it forward.
Frankie figures out a way to secretly track Sue and Axl after they refuse to abide by their curfew while they're home for the summer. Meanwhile, Brick's determined to discover who else could be class valedictorian as middle-school graduation approaches.
In the seventh-season finale, Frankie's determined to ensure Brick can sing at his middle-school graduation after his performance is cut; and Sue feels conflicted after learning she needs to be at Dollywood on the same day as Brick's ceremony. Meanwhile, Axl starts a new job as a country-club counselor and gets mocked by a 10-year-old version of himself.