In the future city "Xinhai City", memories have become commodities that can be extracted, repaired and traded. Lin Mo, a top memory restorer, can sneak into other people's broken memories and piece together the fragments of the truth. He repaired the past for everyone, but he could not find his own childhood. A mysterious commission drew him into the whirlpool: a woman named Su Wan brought a memory core on the verge of collapse, which contained a deserted dark blue beach and a looming lighthouse. When Lin Mo sneaked into this "Deep Blue Dream", he was shocked to realize that this memory was not only related to an "amnesia" disaster sweeping the city, but also inextricably linked to his lost past. Memory is an island, forgetfulness is an ocean, and he must find the lighthouse that guides the way before the storm comes.
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