In 2045 AD, half of Shanghai was submerged in the sea. Between the neon shadows of the "Underwater Zone" and the false bliss of the "Cloud Top Zone," emotional memory becomes hard currency. Lin Xia, the former auditor of the Memory Administration, is now a "memory restorer" traveling in the black market. The scar on her left ring finger is her beacon against lies - "Memories can lie to you, but scars can't." Her obsession is to find out the culprit who caused her sister's memory to be erased - Zhao Li, the director of the Memory Management Bureau.
However, Zhao Li's evidence was subject to terrible "dynamic tampering" and would disappear within 24 hours. When Lin Xia discovers Zhao Li's criminal afterimage deep in her sister's blank memory, a pursuit ensues. She formed an alliance with retired doctor Lao Zhou in an abandoned brain-machine hospital, but encountered a breakdown in trust. Frequent exposure to other people's painful memories put her in a crisis of self-confusion.
The only thing that can crucify Zhao Li is to use his most painful memories as bait to initiate an ultimate showdown that risks "self" in a memory exchange full of neon lights and traps. In this war where memory is a weapon, Lin Xia must realize that the real "me" is not the sum of memories he possesses, but the true feelings and choices that cannot be tampered with and come from the heart when facing everything.
