Edward Stone, a Soviet spy serving a life sentence in a top security jail, makes a daredevil escape by posing as an army officer in a jeep. Beth, Stone's illegitimate daughter, is kidnapped by Stone's accomplices - she is unaware of her father's identity.
Awaiting his escape to Russia, Stone insists on phoning his estranged wife to arrange a meeting. Tension mounts as Maggie's life is endangered, Stone tries to effect his escape to Russia and persuade Beth to accompany him, and a Home Office contact, O'Donahue's. true allegiance is revealed.
