A towering, sealed concrete space. Inside one of those rooms is another man's sex-starved wife. Wearing a mask of chastity and playing the role of an obedient wife, once her husband is sent away, there is another woman there, who does whatever she wants with the man next door or the delivery man, day after day. It's a pity, only the husband is unaware. But even so, other people's wives are lustful. Why do they arouse our lust so much?