In his four years of working at chain restaurant Shenanigans, Dean (JUSTIN LONG) has never really questioned his job there or life after high school. Yet, when his mom informs him of a former classmate landing a lucrative job, he begins to wonder.
His coworker, Monty (RYAN REYNOLDS), however, has no such personal dilemmas. When not showing new employee Mitch (JOHN FRANCIS DALEY) the ropes, he tries to impress sexy hostess Natasha (VANESSA LENGLES) who's almost 18, all while making jabs at lesbian bartender Tyla (EMMANUELLE CHRIQUI) and dealing with his former lover Serena (ANNA FARIS).
She's friends with Amy (KAITLIN DOUBLEDAY) who's now sleeping with Dean who in turn has just been offered an assistant manager job at the restaurant by his boss, Dan (DAVID KOECHNER). He also has a thing for Natasha despite being her boss and old enough to be her father and then some. But Dan has other considerations, such as hostile waitress Naomi (ALANA UBACH) and his busboys T-Dog (MAX KASCH) and Nick (ANDY MILONAKIS) who think they're gangster rappers despite being lily white.
And while dishwasher Bishop (CHI McBRIDE) bandies about philosophical thoughts, Calvin (ROBERT PATRICK BENNEDICT) tries to come to grips with being unable to urinate in public and cook Raddimus (LUIS GUZMAN), when not purposefully wiping ready to be served food on the floor or having sex with his girlfriend, enjoys playing a game with the other guys of exposing their genitalia to the others for shock value.
As a day in the life of these restaurant employees comes and goes and they deal with all sorts of situations involving mean or demanding customers and more, Dean must decide whether he wants to continue working there, all while Monty and Dan separately try to bed Natasha.