The Lunar Avenger and the Crimson Crimebuster, two super heroes from the 1930s Crime Patrol team, have suddenly come out of retirement and appeared on the Ghostbusters’ doorstep. With the Crimebuster in the hospital, The Avenger tells them about the return of their old foe, Fu Fang, who has teamed up with Caldoni’s ghost mob. They’ve been discreetly taking over the city under the Ghostbusters’ noses. The Ghostbusters decide to help and take the turf war to Caldoni under the guise of a rival mob. But even when the mob is taken care of, they still have to deal with Fu Fang!