Jack (Steven Seeger Steven Seagal), a former US invisible agent nicknamed "Flash Man", became an ordinary detective in New York after retiring, and this time he faced the biggest challenge after his retirement. A mysterious and cruel serial killer appeared in Los Angeles, and the local police tried so hard to find any trace of the criminal that the local people were alarmed, so the police chief thought of Jack. Jack comes to Los Angeles with an important task, where his partner is experienced Detective King (played by Killen Avery Venance Keenen Ivory Wayans). The two men have many contradictions due to their inconsistencies in work style and techniques, but in order to complete the idea as soon as possible, they can only tolerate and accommodate each other. Jack and Kim set the net together, only to be escaped by the cunning murderer. At the same time, the new victim turned out to be Jack's ex-wife and her husband, and the evidence at the scene showed that Jack was the killer!