Spies hold the son of a nuclear physicist (Gene Barry) hostage in exchange for the Los Alamos bomb formula.

A woman travels to Hawaii to find out if a man in prison there is actually her missing husband.

In a series of flashbacks, shows that attorney John Morland has given a lift to a hitchhiker who turns out to be a murderer. As a result, Morland himself is implicated in a killing. A pair of detectives discover that Morland has been having business problems and no end of difficulties with his wife Catherine. The trail of clues leads to a surprising revelation.

While stationed in Asia, six American G.I.'s witness the secret ritual of Lamians (worshipers of women who can change into serpents). When discovered by the cult, the High Lamian Priest vows that "the Cobra Goddess will avenge herself". Once back in the United States, a mysterious woman enters into their lives and accidents begin to happen. The shadow of a cobra is seen just before each death.