Billy Carson (Buster Crabbe) must recover bank money that was stolen by recently imprisoned Link Daggett. Carson convinces the governor to allow Daggett and his men to escape, hoping the marauders will lead him to the cash. With his pal Fuzzy Jones (Al St. John), Carson follows the crooks to an old mine shaft where they have a series of supernatural encounters. Carson then realizes that Daggett can't remember exactly where he hid the loot. He must brave the horrors of the haunted tunnel to return the thieves to justice.