Sarah and Daniel have each stood face to face with evil before. This time they'll face the threat together. Youthful and impulsive, Sarah is a tough; no nonsense criminalist determined to measure up to the male cops around her. Daniel is a former special ops soldier adjusting to civilian life while working at his uncle's forensic science center. Now, two killers have brought them together. One is a psychopathic murderer who turns the tables on Sarah. The other is a professional assassin only Daniel understands. Hampered by her inexperience and the sniper's knowledge of forensics, Sarah struggles to understand the unusual clues left at the crime scenes. When Daniel's mysterious past lands him in jail, Sarah must overcome her fears as she finds herself trapped between the killer she is pursuing and the one pursuing her.