Plot
Su-cheol is a serial killer who uses the city sewers down a manhole as his secret hideout. Late one night, a young girl witnesses Su-cheol’s killing and he abducts her. Later, her older sister, Yeon-seo, determined to find her lost sister, discovers the manhole and goes down. As Su-cheol’s blazing madness explodes due to the uninvited guests in his manhole, the two sisters stand against him in desperate attempts to escape out. - KOFIC
