Li Chen: He was a policeman, but he resigned because of an unsolvable case and became a private detective. He has a persistent pursuit of the truth, but he also has some shadows in his heart because of past setbacks.
Song Yuqing: She has dreamed of becoming a reporter since she was a child and is committed to exposing the dark side of society. I met Li Chen because of an investigative report, and subtle emotions gradually developed between the two.
