Dave's patience is tested when Gemma's freeloading sister, Brittany, suddenly shows up with plans for an extended stay. Also, Calvin grows frustrated that Malcolm is still living at home, even with a new job.

When Calvin and Dave get shown up by Gemma and Marty at a local bar's trivia night, the pair hatch a plan for a do-over to redeem themselves. Also, a frustrated Tina decides to take matters into her own hands in order to finally meet Malcolm's girlfriend, Sofia.