Dr Amorest is being blackmailed by some Eastern bloc spies lead by Huberman. He is being asked to defect in order to save his wife, who has been kidnapped. King has trouble convincing the CIA agent Grainger of this as he believes the scientist is going willingly. Helped by the Huberman's secretary they find his wife and try to use her to find her husband. However, she then disappears. Some good detective work enables Grainger to find the couple and the spies who kidnapped them.