In the Shanghai Concession in the 23rd year of the Republic of China, the Church Rose serial case suddenly broke out. Lin Zhan, a criminal psychology professor who had returned to China, was "invited" by the murderer with his business card. As the investigation deepened, the blue dye and the incomplete "Twin Birds" symbol on the deceased actually revealed the secrets of human experiments that his father, Lin Hanchen, had kept secret for twenty years.
From tentative confrontation to fighting side by side with the cold-hearted and decisive Detective Shen Si, Lin Zhan not only uncovered the shocking truth about the revenge of the experimental subjects and the twins fighting for their bodies, but also discovered the hidden conspiracy of the second phase of the military experiment. Chasing the murderer across the ocean, tracking on rainy nights, and court games, the two protect each other in darkness and danger, and their love grows secretly.
From Shanghai to London, from the shadow of experiments to serial murders, this battle involving family affection, justice and redemption finally ended peacefully in the years, and the symbol of "twin birds" became an eternal witness of the two people's dependence on each other through wind and rain, life and death.
