A mother and her son plan a surprise visit to Los Angeles to see her husband/his father. Halfway there they get into a terrible accident in the middle of nowhere and now must fight to survive.
Longtime best friends Sid and Jonesie are dumped by their respective girlfriends. Both without a living situation, they decide to become "bromates", bros who are roommates, which puts their relationship to the ultimate test.
An immature father and his still-living-at-home-thirty-year-old son embark on a prank war that spirals horribly out of control, forcing the two men to confront their intertwined arrested development.