In this irreverent Hong Kong comedy horror film, Stephen Chow stars as Leo, a hapless mental patient-turned-ghostbuster, alongside Karen Mok as Kwan, a curious young girl entangled in his supernatural escapades. Joined by a motley crew of security guards, they attempt to rid a supposedly haunted apartment building of its malevolent spirits, all while Chow's signature brand of nonsensical humor adds brutal and hilarious touches to the mix.