Samantha Crawford is a con artist employed by George Cross. Cross once lost $50,000 to Bret Maverick and is determined to get it back. Two riverboat owners staked Maverick $5,000 which he promptly loses to Samantha. Samantha claims Cross is her father and needs the money to get out of jail. Maverick forms a partnership with Samantha and purchases gambling equipment in a scheme to put Joe Riggs, a crooked game room owner, out of business. Samantha and Cross doublecross Maverick by selling the equipment to Riggs.

Against his better judgment, Bart teams up with Samantha Crawford to recover stolen Treasury plates.

Samantha Crawford arranges for Bret to sit in on a high stakes poker game but he's the fall guy when the game gets robbed.

Bret, helpless against a crafty banker (John Dehner) who robbed him, bides his time — while Bart and friends set up an elaborate con game.