An entanglement on a rainy night revealed the truth about the three-year relationship between Shen Zhiyan and Su Qing - she was just a "substitute" for him to miss his ex-wife. From the forced retention in the dark alley to the emotional outburst in the hotel room, from the question of "have you ever loved me" to the pull and test in front of the bathroom door, Shen Zhiyan loses control in possessiveness and regret, and Su Qing struggles in heartbeat and humiliation. When the label of "substitute" pierces the relationship between the two like a thorn, will this relationship that began with calculations turn into complete destruction, or will the possibility of true love arise out of the brokenness? Every time they get close, there is a sting, and every time they push away, there is reluctance. They are repeatedly pulled on the edge of love and hate, performing the most cruel and true emotional game in the adult world.