In the near future, memories can be precisely deleted and reshaped. Lin Mo is the industry's top "memory architect". He is known for his calmness and precision. He can erase the most painful memories for clients and liberate them from their mental prison. However, he himself is trapped by a fragmented memory of a childhood fire and his missing sister. One day, a mysterious woman named Su Wan brought a strange request: instead of deleting her memory, she wanted to retrieve a memory that was blocked by the "firewall". When Lin Mo dived into the depths of her consciousness, he found that her memory fragments surprisingly overlapped with her dusty past. The professional barriers he was proud of began to collapse. It turned out that the isolated island he relied on to survive was just the tip of the iceberg of a huge truth.