Mike feels like a stupid cupid when he realizes he forgot to make Valentine's Day dinner plans with Molly, but has no reservations about horning in on Carl's romantic evening of wining and dining his new girlfriend, Christina.
Mike gets quite the surprise when his prodigal pop blows into town early for his son's bachelor party, so a peeved Peggy reconsiders going to Molly's bachelorette bash, and turns it into a rambunctious romp to remember.
Molly gets upset when she reviews her wedding photos because in every picture Mike's mouth is open or his eyes are closed. Meanwhile, Carl gets jealous when Christina's ex-husband comes back into her life.
Two youthful cops join the police force's secret Jump Street unit and go undercover at a local high school to investigate a violent and dangerous drug ring. In the process, they are forced to face the anxieties of adolescence all over again.