Silent Sebastian Sutherland (known in espionage circles as Triple S) is a ruthless killing machine. Recruited as a teenager, he becomes the agent of choice for the most covert MI5 and MI6 operations requiring the discreet elimination of adversaries. His trademark is the quiet way in which he dispatches his targets. When his latest mission is observed by a young woman, protocol demands that he eliminate the dangerous eyewitness. But there is something unsettling about Marianne, especially when she offers to shelter him for the night. Sebastian must risk falling into what he suspects is a trap to find out what she knows. And then act.