Thanksgiving for the Hecks at a local restaurant buffet doesn't go well when Sue feels that Mike doesn't like her boyfriend, Darrin, and Brick invites his quirky girlfriend, Cindy.

Mike accompanies Sue on a college tour weekend. Frankie leaves Brick with babysitters and a school project while she goes to watch Axl play in his first college football game.

Frankie acts like a teenager when she hangs out with Pam Staggs, a former classmate who was popular in high school. Meanwhile, Brick surprises Mike by winning an athletic award; Sue pursues some odd hobbies; and Axl seeks a date with Devin Levin.

Valentine's Day aims its sights on the Heck kids when a nervous Brick finds out that his quirky girlfriend Cindy wants him to kiss her on the special day, Darrin asks Frankie and Mike to help out with an exciting scavenger hunt he's putting together for Sue, and Axl begins to question his girlfriend Devin's request that he not give her anything for what she considers to be a lame tradition.

Frankie realizes that she and the family forgot to celebrate Brick's 13th birthday.

Frankie accompanies Brick on a school field trip and attempts to help her socially inept son make friends with a couple of boys. Devin scolds Axl for being mean to his sister. Mike gets a sinking feeling that he may have bullied his brother Rusty a bit too much as kids.

Sue prepares for her graduation and worries the day won't go perfectly. Meanwhile, Brick gets the opportunity to skip a year in school and Axl grows concerned about Devin's fun summer pictures she posted on social media.

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.

Lexie joins the Hecks for their spring break plans where she confesses to Sue that she has a crush on Axl; Mike hires Coach Babbitt as a ringer to help the quarry softball team; Frankie tries to figure out the root of an underhanded comment.

Axl is startled to run into nearly all of his former flames at a St. Patrick's Day party leaving him to wonder if it is a sign about his love life; Brick buys an old microfiche machine at a library sale, leaving Frankie and Mike less than thrilled.