Railroad builders, preparing to tunnel through the mountain where Snagglepuss resides, encounter so much trouble from the firmly entrenched lion that they ask big game hunter Major Minor for assistance.

In flashback from a ‘Rebecca’-style beginning: Ellen Foster, visiting her aunt on the California coast, meets neighbor Jeff Cohalan and his ultramodern clifftop house. Ellen is strongly attracted to Jeff, who’s being plagued by unexplainable accidents, major and minor. Bad luck, persecution…or paranoia? Warned that Jeff could be dangerous, Ellen fears that he’s in danger, as the menacing atmosphere darkens.