Shang Gong Xiaoyu traveled thousands of miles and returned to China from the United States. She stayed at Tianqin Senior High School for two years and had a very bumpy love experience with Xue Haoyu, a gangster in the school at the time. However, she also received Xue Haoyu's undying love until death. On the morning of the new semester, Xue Haoyu didn't notice that Shang Gong Xiaoyu didn't come. Gradually, he heard that Shang Gong Xiaoyu's family had disappeared inexplicably. At first, he didn't think anything was wrong. But half a month after Shang Gong Xiaoyu disappeared, Xue Haoyu began to have inexplicable auditory hallucinations. He could always hear the steady breathing of someone who seemed to have fallen asleep. Moreover, he thought that only he could hear this sound. But when a series of strange things started to happen, he could always hear strange breathing sounds. Until one day, he discovered that all of this was related to Shang Gong Xiaoyu, but he didn't know where Shang Gong Xiaoyu had gone, so he began a desperate and frantic search.
