Lin Yan gained a special ability: he could see the "lie bubbles" floating above other people's heads, and it was clear at a glance whether each sentence was true or false. Relying on this ability, he became a specially hired interrogation expert of the police station and solved countless major cases. But ability comes at a price - every time a lie is exposed, he will lose a piece of his own memory. At first it was a trivial matter, but later it became an important life node. In the end, he even forgot why he had this ability. Until one day, he faced a serial killer in the interrogation room. The other person smiled and said, "Aren't you curious? I gave you your abilities." Lin Yan saw for the first time his bubble of lies - the belief that "I am the messenger of justice" was false. He found that he was being transformed step by step into the "perfect tool" someone wanted. And that person's face, he had seen it countless times in his lost memory - it was a face exactly like his.
