Danny gets caught sneaking out the office supply of painkillers for his troublemaker childhood friend Stevie (guest star Bill Tangradi), who has instant chemistry with Mindy. Meanwhile, Mindy is in for a shock when Heather (guest star Ellie Kemper), 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.