A new case for SIS Chief Charles Winter - 1962. America has set up a quarantine zone around Cuba, preventing Soviet ships from importing nuclear hardware. Meanwhile, SIS Chief Charles Winter is investigating the death of a double-agent whose KGB control, Vasili Korznikov, has recently defected to American Intelligence. Washington isnt keen to let Winter investigate Korznikov, but theres little time for diplomacy, since the Russian ships are already on their way to Cuba . . .