Barbara sleeps with Mac to arouse Frank's jealousy, so Dennis decides to seduce Mac's mom as payback. And Frank's decision to put Charlie in charge at the bar prompts an orgy of backstabbing and double-dealing, with sex as the weapon of choice.

The gang must perform community service after their "mishap" gets them arrested for arson. While fulfilling his duty, Charlie discovers that he has something in common with the coffee-shop waitress. Meanwhile, Frank's attempt to bond with Dennis backfires.