The movie - Under the Light - tells the story of Su Jianming, an ordinary young policeman who works at the Municipal Bureau's Criminal Identification Center, who embarks on a thrilling investigative journey in order to protect the safety of the people.

Su Jianming was in confusion, and what Li Zhitian did opened his eyes.He couldn't help but start to think, what kind of secrets was hidden behind this wealthy businessman?Why can he be so arrogant in fooling others, even playing with fire and burning himself?

Bodies hidden in cracks in walls, people hit with wrenches, these seemingly scattered incidents seem to be inextricably linked to Li Zhitian.Su Jianming made up his mind to uncover the secret behind this and restore the truth.

He began to investigate Li Zhitian's background in depth, tracking his whereabouts and circle of contacts.Soon, some unknown news about Li Zhitian surfaced.Li Zhitian is not just a wealthy businessman, he controls a huge financial group and has endless resources.And these resources were obtained from a mysterious “old man”.

The identity of this “old man” is a mystery, and no one knows his true face.However, it can be seen from various clues that he is a very powerful figure who can influence and control social resources at all levels.Li Zhitian was able to act so arrogantly, perhaps precisely because he had the support and protection of “old man”.

Su Jianming decided to investigate this “old man” in depth. He believed that only by uncovering the answer to this mystery could he truly understand Li Zhitian's true purpose.He began to follow various clues, looking for information related to “Old Man”.Soon after, he finally found an important clue that pointed to a high-level government official.

Su Jianming began to wonder whether this official was the legendary “old man”, and whether he controlled such huge resources?In order to find out the truth, Su Jianming decided to take huge risks to investigate the official in depth.However, he also understood that once a person of this level was involved, the consequences would be unpredictable.

However, Su Jianming is not afraid. He firmly believes that only by uncovering the truth can the full picture of this case be restored.He decided to take risks and continue to follow the clues to uncover the real secret behind the surging undercurrent.