Angus Simmons had it made. A successful television program, a beautiful girlfriend, 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 the mark of a bullet on his body. 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.