When average guy Preston Tylk (Luke Wilson) finds out that his wife, Emily (Mili Avital), has been cheating on him, his life quickly spirals out of control. After leaving the house, Preston returns to discover that Emily has been killed. Intent on exacting revenge, he seeks out her lover, Jonathan (Norman Reedus), who is the likely murder suspect. As things get more complicated for Preston, he hires private investigator Dick Muller (Dennis Farina) to help him track down the elusive Jonathan.