War hero Wally Shanks (Michael Witney) is the unwitting pawn in an extortion racket masterminded by his father-in-law, "respectable" banker Hal DeWitt (Richard Carlson). The crooks rely upon Wally to attract his fellow servicemen to DeWitt's finance company for loans, at which point they are all rejected and turned over to a bloodsucking loan-shark operation. Hoping to throw a monkey wrench in this scheme, FBI agent Colby (William Reynolds) poses as an ex-GI named Ed Loomis. This is the final episode of The F.B.I.'s fourth season. ~ Hal Erickson, All Movie Guide