Tae-suk (Jae Hee) drifts around on his motorcycle looking for empty houses to stay in. He goes from door to door and puts up flyers in the keyholes of each house. He later breaks into the house where the flyer has not been removed, assuming that the owner is away. Tae-suk lives in the empty house until the owners return, but never steals or ruins anything. He simply guards the houses for a few days, even fixing broken items.
One day, Tae-suk meets his destiny -- a married woman named Sun-hwa (Lee Seung-yeon). When Tae-suk breaks in and sneaks around her wealthy home, Sun-hwa hides in the dark and silently watches him. At first she's afraid of him, but when she sees him fixing a broken scale, she realizes he's not a thief and continues to observe him. That same night, Sun-hwa receives a phone call from her abusive husband. Tae-suk overhears it and leaves, but he can't stop thinking about Sun-hwa.
Tae-suk sneaks into her home again, and the two get to know each other. But when her husband comes home and is abusive to Sun-hwa, Tae-suk grabs a 3-iron and swings it at golf balls, which strike her husband, who collapses. Tae-suk and Sun-hwa run away and begin living in empty homes together until the day they find a dead body...
Studio: Mongrel Media
Producer(s): Kim Ki-duk
Screenplay: Kim Ki-Duk
Official Site: www.sonyclassics.com/3iron/