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

A fiery bandit rides again -- or does He?

While vacationing on a California ranch, three boys decide to investigate strange wails that come from a mysterious cave where a famous outlaw disappeared.

While vacationing on a California ranch, three boys decide to investigate strange wails that come from a mysterious cave where a famous outlaw disappeared.

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