Jiang Hao and Su Yue, a couple who have lived together for six years, find their relationship gradually losing its spark. Influenced by his colleague Old Liu, Jiang Hao becomes obsessed with "partner swapping" games and suggests they try it to rekindle their passion. Su Yue is initially shocked, especially after an intimate video of her being drugged is leaked. However, to compensate, she agrees to invite her best friend Keke, an emotional counselor, to guide them. Keke demonstrates intimate techniques, leading to entanglements among the three. Subsequently, Old Liu and Xiao Mo join, and the four hold a weekend gathering to conduct the partner swapping experiment.
