In Linggang, a city shrouded in rain and fog all year round, memories can be extracted, stored and traded. Chen Mo is the industry's top "memory submariner". He can sneak into the deepest consciousness of others and retrieve lost fragments, but his own past is blank. A mysterious commission broke his peaceful life: a woman named Lin Wan asked him to retrieve a "core memory" that was forcibly erased by her father before his death. When Chen Mo dived into the broken sea of consciousness, he was shocked to find that the fragments of the target's memory overlapped with the only lingering phantom in his mind. This is not only a simple task, but also a dangerous journey to find yourself. On the island of memory, he must face the forgotten truth, otherwise he will be completely swallowed by the ocean called the past.
