Detective Danny O'Brien is celebrated as a hero in Los Angeles for capturing the notorious serial killer Simon Moon, also known as "The Terror." Simon is responsible for a series of brutal murders that have left the city paralyzed with fear. Despite Danny's success, he is haunted by the memories of their deadly confrontation and fears that his nightmarish nemesis may return. His personal life also faces upheaval as he tries to balance his demanding job with his relationship with his supportive girlfriend, Kay.

As Danny's fears begin to resurface, news breaks out that Simon Moon has escaped from a prison hospital, echoing the horror that plagued the city years prior. The authorities dismiss any concerns, but Danny suspects that the killings are about to start again. He revisits the case files, determined to prevent another wave of terror. However, his obsession with recapturing Simon jeopardizes his career and relationships. As bodies begin to pile up, Danny realizes that stopping Simon this time will require him to confront his deepest fears and overcome the psychological scars from their previous encounter.