In 1989 32-year old Charlie Hayes, a stock market trader, fell to his death, a presumed suicide, from his office building near Tower Bridge but a blow up photograph in a retrospective art exhibition reveals a background figure who pushed him.Cash-strapped Steve takes advantage of insider information as the team interviews Charlie's former girlfriend and colleagues, prime suspect being obnoxious Kevin Dodds, whom Charlie exposed as a rapist and the team brings him in. However the rape gives him an alibi for the murder and Danny and Steve discover that Charlie was sacrificed to prevent him disclosing certain anomalies within the company's trading.