A neighboring couple shares a passionate embrace in the shared entrance of their apartment building. The gloomy man takes their open flirtation as a mockery of his single status, and plots to get revenge on his daily grudge with a hypnotizing device he comes across by chance. "When you wake up... you'll want to bear the child of the man in front of you..." The man, who is getting carried away by the effects that are greater than he expected, begins to dominate not only the wife but also the husband, encroaching on the couple's daily life...