He Wen, a seemingly indifferent and ordinary office worker, actually carries the secret identity of a police undercover agent. He was ordered to get close to Pei Yan, a financial genius who behaved erratically and was keen on "experiments on human nature". Pei Yan used money as bait and human nature as a gamble, playing with the fate of countless people in the palm of his hand. He Wen's mission is to sneak into its core and collect enough evidence to convict. However, as he approached step by step, he became the most interesting "experimental sample" in Pei Yan's eyes. Pei Yan took an unprecedented interest in this unmoved, cold and self-possessed man. He set traps one after another, hoping to see him collapse and sink. He Wen knew that the opponent was a dangerous beast, but he had to pretend to be flattering under the extreme pull. He thought that he could always remain sober and restrained, and that he was the perfect chess piece laid out by the hunter. Until he discovered that in this game where the heart was the bet, the first person to indulge was himself. And Pei Yan's eyes that see through the world are looking at the cage called "love" that he has woven with his own hands with a crazy yet gentle smile.
