Knock Knock. Who's There? is an anthology of horror tales where ghosts and karma seem magically intertwined. In "Missing" a bride dies in a tragic car accident but she's not too keen on leaving the living world just yet. In "Karma" Shou Yung's aunt and uncle go to far to appease their greed but she won't let them get away with it. Finally, in "Smell" the ghost of a teen attaches herself to a funeral parlor leading to an horrific discovery.