Tim's fiancée, Julie, finds it distasteful and Tim agrees to skip the dinner, until he bumps into Barry (Jeff Dunham) – an IRS employee who devotes his spare time to building elaborate taxidermy mouse dioramas – and quickly realizes he's struck idiot gold. Tim can't resist, and invites Barry, whose blundering good intentions soon sends Tim's life into a frenzied downward spiral and a series of comic misadventures, threatening a major business deal, bringing crazy stalker ex-girlfriend, Darla, back into Tim's life and driving Julie (or so Tim thinks) into the arms of another man.


