Detective Inspector Alex Menzies starts her first day in a new job with a call to the scene of a terrible murder. The body of a young man has been left on a funeral pyre with a hole in the middle of his forehead. The investigation into the bizarre murder is lead by Alex's new boss Detective Superintendent Tom Russell. A vicious, bigoted racist is the first suspect but within days the city is shocked by the discovery of another mutilated and burned body. The killer's signature is a small cross placed in the victim's hand and the terrifying possibility of the city's first serial killer in over forty years gives the police investigators a challenge that will tax all their skills and combined experience. The killer continues to find new victims and with each death the case becomes more puzzling and the police more desperate. As fear grips Glasgow, the investigative team must find the Soulseeker before he kills again in his search for the truth about the human soul.