A married woman, Kaho, returns to her in-laws' house. One day, after shopping, she gets caught in a sudden downpour and arrives home drenched, her clothes clinging tightly to her skin. From the second floor, eyes gaze at Kaho's sensual figure. The shut-in brother-in-law who has been living on the second floor for years begins to harbor lewd feelings towards Kaho… Creaking stairs, echoing footsteps, fueled by lust, the brother-in-law pounces on Kaho…
