The police act as the guardians of the night, guarding the city. Through different cases, they reveal the stories behind the people involved and explore the dark side of society. In addition to the victims in the case, the characters played by Ruco Chan, Natalie Chan, and Sharon Chan are also people with stories. Their past experiences affect their lives, and every choice also affects their future lives. Faced with all kinds of entanglements in life and the love-hate entanglement in relationships, how can we make the right choices and find a way out in life?