The tragedy breaks into the life of FBI agent Adam Spear, when he faces the biggest challenge of his professional life. The killer he chases attacks his family and dies while trying to destroy the evidence at the crime scene. Spear falls into a spiral of depression that drags him to a mental sanatorium, losing the trust of his bosses and colleagues. When he returns to the Agency, his superiors transfer him to a provincial office, assigning him tasks of little importance. During one of these tasks he arrives at Evergreen, a small, secluded and quiet town in Wisconsin, where a series of murders take place, which Spear understands that only he can solve… But only if he survives.