Chase Black, guilty of the brutal serial murder of five families, walks free in Denver on a technicality. When Black heads to London to promote the memoirs he wrote while in prison, his lawyer hires the UK's best bodyguards—led by the American Alex Cahill. When it becomes clear that a violent psychopath is hunting Black, and may in fact have been the serial killer all along, Logan is caught between his duty to a client who may be a killer and the instinct to survive the increasingly deranged individual that wants him dead.