Cheung Yan-lai, framed by his elder brother Cheung Yan-tsuen, is sent to jail. He manages to escape and plans to take revenge along with a quasi-scientific sorcerer, who uses orang-utan blood to turn the Yellow Hair Monster into a lethal weapon. If it is fed with fresh human blood, the Yellow Hair Monster will become proof against any combat. Learning from the newspaper that Yan-tsuen is to donate a gold Buddha for fund-raising, Yan-lai, accompanied by the Yellow Hair Monster and the sorcerer, goes to get even with him. They are caught in a warehouse. A female ghost suddenly comes out and kills Yan-tsuen. Heroine Wong Ngan-g and the Director rush to the warehouse when they are informed. When they see the sorcerer using a poisonous solvent to dissolve a corpse, they begin to fight. As a result, the Yellow Hair Monster is killed by the poisonous solvent, Yan-lai gets an electric shock, and the sorcerer is scared to death by a vampire.After that, Mother Lo, Yan-tsuen's maid, reveals that she disguised herself as the ghost and the vampire. Her last words reveal that the gold Buddha originally belonged to her father. Yan-tsuen murdered her father and raped her. She sought revenge and to take back the Buddha, so she first killed Yan-tsuen's wife and then made herself up as a ghost. The whole truth has come out and Wong Ngan-g gets the gold Buddha on which there is an inscription reading "Doing Charity with Buddhist Mind." Wong Ngan-g, Wu Ah, and Heung Ngan are satisfied with their work.