Bat sees a poker game break up when a player accuses the dealer of cheating. Bat learns that all the games in town are rigged with the Sheriff collecting a payoff so Bat tries to start an honest game but he is jailed and banned from cards.

A gang of river pirates take over the paddle-wheeler Dakota Queen and relieve the passengers of jewels and furs and Bat of $10,000. Bat uses a barrel of rare cheeses to trap the gang's gluttonous leader to recover the items.