Cartwright's racket is to sell a ranch and then have Mason and his men drive the ranchers away so he can resell it. If they want their money back he gives it to them and then has them killed. Jack arrives and learns that Mason and his men are the culprits but that they have a boss. He suspects Cartwright and sets trap to expose him.

"HE'S LEAD POISON...TO RANGE RACKETEERS!"