Mystery on a Rainy Night

One rainy night ten years ago, Gu Chen's parents died mysteriously. The police hastily closed the case, but he still could not accept the result. Ten years later, he became a private detective, obsessed with uncovering the truth behind his parents' deaths. One day, an old man came in the rain and asked Gu Chen to find his missing granddaughter Chen Xiaoyu. As the investigation deepened, Gu Chen discovered that the disappearance case was subtly connected with the death of his parents. The clues point to an abandoned factory, and there is a huge network hidden behind the factory. During the investigation, Gu Chen met female police officer Su Wan. From the initial conflict, the two gradually established trust and eventually became a tacit partner. At the same time, a mysterious figure named "Shadow" appears frequently and seems to be secretly helping Gu Chen. As the truth gradually emerged, Gu Chen discovered that his parents were not really dead, but were forced to hide their identities. On the road of revenge and redemption, Gu Chen not only has to face external enemies, but also faces the inner shadow. Can he uncover the truth and complete self-salvation? The mystery in the rainy night will eventually come to light.