What if I fall? What if she falls? What if he falls? Is this a fallen era? The story takes place in Shanghai. Misha, a nude model, fell off the rails and died. Xie Cun (the operator of Club Green Door) discovered that Misha's underground lover was actually his boyfriend Ji Pei (a professional manager of a multinational company). In the process of tracking down the truth about Misha's death with his friends Hu Yue and Xie Ye, they discovered Ji Pei's secret by chance...