A young widow in her prime, Haruki, secretly meets with her late husband's subordinate. Seeking solace from her loneliness, she surrenders to hidden desires in the darkness. Drawn into the silent room's solemn SM wake, she crosses the boundary between pain and pleasure. Amid a quiet, dignified atmosphere, a shamelessly lewd relationship unfolds. The sorrow she endured alone proves more than enough to moisten her crotch with heat. Chasing new emotions, she begins walking a path from which there is no return.