Angus Simmons had it made. A successful television program that he hosted, a beautiful girlfriend, and admired by many for his mountaineering exploits. And then he fell while climbing a skyscraper in London. Initially, it was thought he had lost his grip, but that wasn't the man: a meticulous planner, his risks measured, and it wasn't a difficult climb, not for him. It was only afterwards on examination that they found he had been shot. It then became a murder, and that was when Detective Chief Inspector Isaac Cook and his Homicide team at Challis Street Police Station became interested.