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In 2147, my father announced in a global live broadcast that humans will reach Alpha Centauri in three hundred years. That coordinate was witnessed by 34 billion people, anchored in the timeline, and can no longer be erased. That same night, my parents disappeared. Four-dimensional beings existing in the time dimension have intervened. For them, the past, present, and future are revealed simultaneously, and the expansion trajectory of human civilization is clearly visible, constituting a disturbance to the order of the universe. They don't hate humans, they just prune. Time in the solar system begins to be repaired, and everyone's memories are rewritten. The parents never existed. There is only one person left in the universe who still remembers them, flying alone on the spaceship to Alpha Centauri. Meanwhile, on Earth, a man named Karen wakes up from a mission to Ganymede to find that he has a four-hour memory gap. His friend Su Li said it was just a dream. His backend log is locked, and the authorized persons are Su Li and Chen Rui. There is a state in the brain-computer interface that he has never seen before - the extreme state. He doesn't know who he is. He thought he knew. Two clues, two types of amnesia, pointing to the same question: If you remember something you shouldn't remember, that memory itself means something.