After losing her husband, Maki proposes a new life with her sisters, Mina and Misa. Mina, who harbors resentment from being bullied by Maki in the past, is reluctant, but Misa—lonely and emotionally vulnerable—welcomes Maki into their home. One night, Mina walks into the room and is stunned to find Misa and Maki entwined in a bewitching, sensual embrace, lost in mutual pleasure. The next day, Mina confronts Maki, only to uncover hidden secrets from their past, and gradually finds herself drawn into their mysterious, intoxicating world of desire. A deep, seductive relationship begins to unfold between the three women.