Once upon a time, a big family lived in three apartments on the same stairwell. Then they moved away, and other people bought the housing, not suspecting that all three apartments were connected by secret doors… Well—are they really secret doors? Or do the new residents only pretend to live on their own, while, hiding from each other, they slip into other people’s homes and quietly spy on the neighbors? And the reason for everything is passion: a scorching, spicy, agonizing unrequited love that traps a forty-year-old man, a young girl, and a mature woman in a tragic love triangle…