In Xinhai City, where neon lights and rain intersect, Ling Chen, the top memory scavenger, makes a living by erasing pain and regards forgetting as compassion. Until the mysterious woman Su Yin brought an "ember" - a fragment of memory that should have been completely destroyed. This ember is not only the key to revealing the monstrous conspiracy, but is also closely connected to the pain of losing his daughter that has been buried for many years. Ling Chen was forced to make the final choice between false peace and the cruel truth.