The Cannons care for a wounded relative who repays them by stealing the ranch payroll.

Uncle Dan Brookes arrives suddenly after a 15-year absence seeking safety in the heavily fortified ranch. He conceals the fact he is wanted dead or alive for murder and has been shot by bounty hunters Mace and Gurney. When Buck hires the bounty hunters as ranch hands, Brookes saves his own skin by offering to help Mace and Gurney steal the Cannon payroll.

Ricardo Montalban guest-stars as a wounded bandit leader who is captured by the Cannons and tells them his followers will destroy them unless he is released.

When El Tigre's brother, Rafael, threatens to attack the ranch to free the notorious bandit, John Cannon has difficulty persuading his wranglers to hold the outlaw for trial in Tucson. During the attack Victoria frees El Tigre when he promises to leave peacefully and to stop the bloodshed, but he shows his true colors by making John his captive.