When Ken Baxter (Ken Maynard) and his sidekicks Panhandle (Ralph Peters) and Pancho (Julian Rivero) stumble across an injured archaeologist (Michael Vallon), the wounded man tells the trio about a mysterious Indian cave but is murdered before he can reveal all its secrets. Determined to locate it, the threesome follows a trail that leads to the ranch of a pretty cowgirl (Fay McKenzie), who has no idea the cave in question is on her property.