Criminal Xiao Yu escaped in the dead of night, sending shockwaves through Xicheng Prison. Why did Xiao Yu escape? How did he get out? Shen Hua, a prison officer, sensed something strange about the escape. Thinking of how the atmosphere in the prison had seemed off lately, as though an invisible shadow were present, disturbing the peace of this normally enclosed place, he couldn't help growing suspicious. For more than a month, the search teams returned empty-handed. Under immense pressure, Shen Hua was plunged into deep thought. As the manhunt progressed, the fog gradually lifted, and the truth finally came to light... A stirring tale, a tragic romance, a shocking deal behind the scenes. Law, morality, human nature, family bonds, love, friendship, revenge... Everything quietly unfolds here in an extraordinary way...