For as long as crime boss Albert Mendoza (Everett Sloane) has been running a notorious ring of hired hit men, District Attorney Martin Ferguson (Humphrey Bogart) has been hunting him down. But Ferguson cuts a deal with Mendoza's henchman Joe Rico (Ted De Corsia), and the mob boss is finally arrested. However, Rico dies mysteriously before he can testify against Mendoza.

Charles Hathaway wakes up in West Wales with no recollection of who he is or how he got there. With the help of a Cardiff specialist, he retraces his life so that all seems well with the world. But more detective work starts to uncover an alarming chain of stunning wives.