In a mental institution, Young-goon believes she is a cyborg and refuses to eat, 'charging' herself with a transistor radio. One day she sees Il-soon, who has the ability to steal habits and characteristics from people, playing ping pong in a mask. Charmed by this off-beat character, she and Il-soon become fast friends. But when she faints from the lack of food and becomes delusional, Il-soon must find a way to get her eating again.