Modern agent Lin Sheng died accidentally while performing a mission. His soul traveled to San Francisco in the 1960s and was reborn in the body of Situ Sheng, a Hongmen playboy. At this moment, he is being framed by the Hongmen traitor Three Elders and is about to be sunk into the San Francisco Bay. In a desperate situation, the "Big Boss System" awakens and embarks on the road to conquer the world.
