In the near future where technology can strip away painful memories and seal them in the "memory core", Lin Mo, the top "memory submariner", sneaks into these broken islands of consciousness all day long to find lost fragments for clients. He carried out the task numbly, just to raise funds and find clues about his missing lover Xiaoran. A mysterious commission from a business giant brings him into the core of the memory of his late wife Su Wan. However, in this sea of oblivion built of sorrow and fear, Lin Mo not only discovered a sinful secret that had been deliberately buried, but also saw the shocking truth closely connected with his own past. He must navigate the storm of memory or be swallowed whole.