An eerie moaning sound is coming from a cave where a young bandit disappeared many years ago. Ranchers nearby figure he must still be alive. The Three Investiga

An old trunk involves the three investigators with dangerous criminals seeking a cache of stolen money.

A hidden treasure is suspected, some criminals with a plan show up, and the Three Investigators end up right in the middle.

The high pitched scream produced by an alarm clock sets the Three Investigators on the complicated and dangerous trail of art thieves.

Searching for a legendary pirate treasure, the three investigators find a band of modern day pirates.