When the mutilated body of a young woman is discovered in Boston's historic North End Detectives Ed Fischer and John Nadeau are called in to investigate. Despite the brutality of the crime, there are no leads and it appears to be an isolated incident. However, a second murder just twenty-four hours later in Boston's Backbay Fens seems eerily similar and the victims appear to be linked. Before the duo can put the pieces together, two more dead are found. Faced with a rising body count and the real prospect of a serial killer on the loose, the detectives must race against the clock to uncover...

Mark Enos arrives in his native Massachusetts fresh off a tour of duty in Iraq a broken man. Destitute, drug addled and racked by recurring nightmares, Mark sinks deeper into darkness and despair until one night he is attacked by a strange beast. In an instant Mark's life begins to turn around; physically he feels stronger, the nightmares disappear and he begins to pick up the pieces of his broken life. Though seemingly blessed with a second chance at life Mark begins to question his 'gift' as his injuries heal at a preternatural rate and he begins to encounter a series of strange happenings....