No good deed goes unpunished…hours after finding a discarded USB memory stick, Tom Bryce (Adam Woodyatt), inadvertently becomes a witness to a vicious murder. Reporting the crime to the police has disastrous consequences, placing him and his family in grave danger. When Detective Superintendent Roy Grace becomes involved, he has his own demons to contend with, while he tries to crack the case in time to save the Bryce family’s lives.