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On his 18th birthday, Su Lin's blood began to flow backwards, and his twin sister Su An was stabbed in the heart by a mysterious man in front of his eyes. As he screamed and tried to catch the murderer, the entire city suddenly fell into a 72-hour amber cage. What's even more suffocating is that every time time is reset, Su An, who suffers from dual personality disorder, will write a warning in red in his diary: \