Tranquility. Night. Several young women fall in succession. Clues to the killer: a sturdy back. A sturdy rope. Beyond that, there were no other clues left at the crime scene - except for a few old photographs of life. On those few clues-only photos, in addition to the victims, there is a girl who goes by the alias Xiao Ying. Who was she? Is she the murderer? Where can she be found? Captain Liu of the Public Security Bureau and his assistant Mai Tao are at a loss. Seth Waller is involved in this serial case as soon as he returns to China. This Chinese-American agent of the U.S. military returns to China as an amateur detective who assists the police in solving crimes. With his new concepts of forensic science and criminal psychology, Seth peels the skin off the case and pushes it forward layer by layer. With the depth of the investigation, Seth found a series of secrets he did not even dare to think of ...... unscrupulous hospitals, unethical bosses, lovers derailed, Xiao Shadow appeared ...... the most alarming Seth, is the partner and best friend of Mai Tao in this case actually played another role! . Essien's work juxtaposes the imaginative with the meticulous. Each of his books centers around the character of Seth Waller, with plot twists and broad horizons. In his work, he condenses everything in the world and everything in the human heart. In his whimsical fantasies and reasoning, the ugly human nature is shattered and the good life comes to life.