I, Gu Yanci, am the most mysterious cold case detective in the city. I have never failed in the cases I handled, but I was involved in a conspiracy because of an old case. Ling Shuang, the bodyguard sent by my superiors, became the "tail" that I couldn't get rid of - she was extremely powerful but always liked to pretend to be a pig and eat the tiger. She was once my nemesis on the way to handle cases.
As serial murders occur frequently, we are forced to join forces: I decipher the clues, and she charges into battle. The pursuit of dark opponents, the competition for resources by insidious colleagues, and the clues that are difficult to distinguish between good and evil bring us closer and closer to the edge of life and death.
When the truth of the old case came to light, the choice of self-sacrifice, the countdown to the fateful showdown, and the love-hate entanglement hidden under the cold mask all told me: this collaboration with the Valkyrie was no longer a simple case-solving, but the beginning of changing one's fate against the odds.
