When Mindy throws an office Christmas party at her apartment, she is eager for her colleagues to finally meet her boyfriend, Josh, but her plans go awry when she discovers a secret that Josh has been hiding. Meanwhile, Jeremy deals with doling out the office holiday bonuses, much to everyone's chagrin.

Danny gets caught sneaking out the office supply of painkillers for his troublemaker childhood friend Stevie who has instant chemistry with Mindy. Meanwhile, Mindy is in for a shock when Heather, Josh's ex-girlfriend who ruined Mindy's Christmas party, shows up at her doorstep to ask for her blessing to move into her apartment building. Mindy says yes, but immediately begins to plot ways to ruin Heather's rental application.

When Mindy tells Danny she has a crush, he thinks she's talking about him instead of Cliff the lawyer. Meanwhile, Morgan and Peter find Mindy's phone and respond to a text from Cliff, which starts off innocently, but escalates into something that may lead to unintended romantic consequences.