After being approached in Amsterdam by a man asking him to assassinate American businessman Alexander Woolf, Lang attempts to warn the intended victim at his Belgravia flat, finding Woolf gone and instead clashing with (and incapacitating) a mercenary, then encountering Woolf's daughter Sarah. Afterward Lang finds himself under intense scrutiny from both the Ministry of Defence and the Central Intelligence Agency, who claim Woolf is an international drug smuggler currently under investigation. Intrigued by the sudden interest of two government agencies, Lang attempts to track down the man who approached him in Amsterdam, unexpectedly finding him in London, and even more unexpectedly discovering that the man is Alexander Woolf himself.