Violent thug Crocodile lives under a bridge by the Han River in Seoul together with a peddling boy and a homeless old man. Crocodile saves a beautiful young woman Hyun-Jung from suicide by drowning, but only to use her for sex. Yet, for some reason the woman, betrayed by her lover, stays with Crocodile, and a peculiar family-like friendship forms between the four homeless people. Crocodile gets in ever deeper trouble because of his mindlessly violent temper, and eventually Hyun-Jung decides to attempt suicide again.