Single and indecisive, Eddie (Ben Stiller) begins dating the incredibly sexy and seemingly fabulous Lila. At the urging of his father and best friend, Eddie proposes to her after only a week, fearing this may be his last chance at love, marriage and happiness. However, while on their honeymoon in sunny Mexico, Lila reveals her true beyond-awful nature and Eddie meets Miranda, the woman he feels to be his actual soul mate. Eddie must keep his new, increasingly horrid wife at bay as he attempts to woo the girl of his dreams.