In a future city where memories can be stripped away and stored, Lin Mo, a top memory restorer, received a seemingly simple commission: to retrieve the memory of a rainy night for the mysterious woman Su Wan. However, when he dived into the broken memory fragments, he discovered that this was not an ordinary retrospective, but a carefully constructed maze of lies. Every piece of memory he repairs brings him one step closer to a dark secret that could subvert the order of the entire city. He must navigate the deep sea of oblivion to recover not only her past, but also the buried truth about himself.