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.