A terrorist attack struck at the high school graduation ceremony, and the criminal Smokey left only two people alive. One of them, He Xia, was taken away and locked up by the criminal, and was intentionally trained to become a patient with Stockholm syndrome. The other, Jiang Jinze, has always been guilty of He Xia's death. It wasn't until they met again two years later that the clouds were gradually lifted, and they learned that the terrorist attack at that year's graduation ceremony was not as straightforward as they had seen.