In the near future where memories can be repaired, tampered with or even deleted, Lu Chen, a top memory restorer, is unable to repair his shattered memory after a car accident three years ago. He is like an island, imprisoned by a forgotten past and the phantom of his dead wife. It wasn't until a mysterious woman named Su Qing came to the door with an encrypted "echo" memory fragment that Lu Chen discovered that her memory fragments were surprisingly similar to his own past. In order to pursue the truth, he must dive into the deepest depths of memory and fight against the huge shadow that tries to rule the world with "perfect forgetfulness". This is not only about a piece of erased truth, but also about regaining the right to have a complete past as a human being.
