This stylish '60s espionage thriller bounds between London and Berlin, following cool and inscrutable Alexander Eberlin (Laurence Harvey), a British agent tasked by MI-6 with finding the double-agent in their midst. Unknown to British Intelligence, Eberlin is the Soviet Agent Krasnevin, and when his Soviet contact is eliminated, Eberlin is running for his life, while still forced to play the game. Eberlin is tracked closely by his partner Gatiss (Tom Courtenay) an agent-assassin who despises him and is suspicious at every turn. Complicating matters is the flighty but sincere Caroline (Mia Farrow), who enters Eberlin's life and truly wants to be a part of it -- perhaps the only real thing in it. But, Eberlin's created a web so tightly wound about him that he no longer can be sure who to trust, or even of his true identity. Newly remastered.

A Russian double agent, posing as a British spy for the past eighteen years, finds his request to return home denied. His life is further complicated when British Intelligence assigns him to eliminate his Russian counterpart and friend.