In the near future where memories can be accurately removed, Lin Mo is the industry's top "memory weaver". With scalpel-like precision, he peels off the painful past for clients and seals the memories in a database called the "Sea of Oblivion". He is calm, efficient, and never empathizes with his clients until he meets Su Qing, a woman who asks to erase the memory of her late husband. The operation seemed perfect, but Su Qing began to be entangled with "hallucinations" and "echoes". The removed memory refused to be forgotten in a strange way. In order to solve the mystery, Lin Mo broke the taboo and sneaked into the isolated memory data, only to discover a shocking secret hidden by sadness. What he faced was not only the loss of control of technology, but also the ultimate torture of human nature, love and forgetfulness.