An innocent man is locked up for a robbery that he did not commit. His loyal girlfriend tracks down the culprit, but her plans to bring him to justice go horribly awry.

A chance encounter with a blonde in a sports car causes Jack to give chase in his souped up mustang and culminates in a car crash and a sexual encounter. The blonde asks that he sign that the accident was really her husband's fault, who was not even present, for insurance issues. Jack agrees and finds himself the alibi for murder and with his own past criminal record, he fears jail for lying under oath.