Jiang Han, who had just graduated from the police academy, with a longing for justice, passed a rigorous selection process and became a male prison guard at Qinghe Prison, the only women's prison in the province.
In this micro-society enclosed by high walls and electric grids, men are absolutely "rare animals." Not only does he have to face hundreds of female prisoners of all kinds - from former top celebrities and Kochi financial fraudsters to ruthless black sisters and housewives who killed their husbands out of despair; he also has to carefully balance workplace relationships in a circle of all-female colleagues, both to avoid gossip and to establish law enforcement prestige.
A seemingly ordinary prisoner suicide broke the tranquility of Qinghe Prison. Jiang Han keenly discovered that this was not an accident, but a carefully designed "killing with a borrowed knife". In order to find out the truth, he must move forward amidst the cunning temptations of criminals, the doubts and warnings of colleagues, and the undercurrent of power struggles in the prison...
