Terminally ill Polish refugee Henryk Lamprecht, a decoder for British Security, has a score to settle with the Russian who killed his wife and daughter. As he is close to death, he has no time to lose when an opportunity he has been waiting for turns up.
But now, through a chance meeting with his old friend Zaleski, ex-cop John Raven is involved, and so is Lamprecht's English sweetheart. And so the game of cat-and-mouse begins . . .