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 feels nothing but guilt when she realizes that she and the family forgot to celebrate - or remember - Brick's 13th birthday, which had come and gone three months earlier; Sue goes a bit overboard in trying to establish something unique about herself in order to receive a senior superlative recognition and finally be included front and center in the school yearbook, and Devin does not like the way Axl categorizes women in his phone contacts and abruptly breaks up with him.