Hank learns about a tool thief on the loose who uses a monkey to help him do his dirty work. And before long, Hank finds himself face-to face with the pilfering primate! Can Hank help to stop the criminals in their tracks, or will the crooks get away to continue their monkey business?

Hank the Cowdog's adventures include being trapped in a runaway pickup truck and later discovering a nest of trespassing stray cats in a haystack.