On an isolated island that is mysteriously "cleaned" every 49 days to erase everyone's recent memories, "memory reconstructor" Lin Mo accidentally discovered a note that should not exist, which read: "Don't believe in the light of the lighthouse." This weak clue is like a thorn, piercing the island's false calm. In order to retrieve his forgotten love and truth, Lin Mo begins a dangerous game against forgetfulness. Every step he takes, he may return to zero after the next "cleaning", and the lighthouse that controls everything is watching him with a silent light.
