In his wife's absence, her older sister bursts into the apartment – carrying a temptation that's hard to resist. Just a few glances, accidental touches... and the tension becomes unbearable. He knows it shouldn't happen. She knows exactly how to seduce him until he forgets everything that's right. As the boundaries blur, a game begins in which reason loses to desire. A fascination with what is forbidden. Full of passion, unspoken words, and physical tension that finally explodes in the bed of his wife's sister.