Ken Baxter, Pancho and Panhandle find the wounded archeologist Dr. Wahl who works for the Government and take him to Blue Mesa Trading Post. Also staying there are two other archaeologists Dr. Floto and Baron Starkoff. Their main goal is to secure the helium supply in an Indian cave. Dr. Wahl is found stabbed dead. The cave is located on an area claimed by the owners of Lazy Y Ranch, Letty and Jim Morgan. Ken is hired by Joe Larkin, the Cup Ranch owner in order to take possession of a cabin on the Morgan land to get the title as well. Ken finds a secret way from the cabin to the cave.
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