It is Christmas Day in York. A woman is found dead in her bed. A suicide note is found on her chest. It reads ‘I am so sorry Martin’. Hours later the police are called to a house a few miles away.
A mother and her daughter have been brutally attacked; the mother is dead and the daughter is barely alive. The father is found shaking uncontrollably in the corner of the room. He is covered in blood but he is unharmed. His name is Martin Willow.
Detective Sergeant Jason Smith is put in charge of the investigation. After reaching dead end after dead end, Smith starts to put the pieces together and figures out that Martin Willow is innocent and the killer is still out there.
The little girl who was attacked on Christmas Day wakes from her coma and gives Smith a clue about the attacker; a piece of a song she heard directly before the attack. Smith then finds himself in a race against time to find this maniac before he kills again.