A couple at risk are attempting something new. Hae-il sleeps with Sook-hee because she charms and seduces him. Poong-cha and In-sook have sex out of habit but without enthusiasm. One day, Poong-cha is driving and gets into an accident with Sook-hee who is walking. Sook-hee falls for the manly Poong-cha and gets away with him far away to have tasty sex. At the same time, Hae-il and In-sook start seeing each other too...