In the year 2030 in Feng City, assassin Ge Jun and his partner Song Yan are tasked by their organization to assassinate a journalist named Meng Bai. During the assassination, Ge Jun starts to have fragmented memories with Meng Bai, and finds a photo of himself with Meng Bai in his room. Ge Jun begins to investigate his own identity, which leads him to an Alzheimer's research institute for wealthy clients. After several twists and turns, Ge Jun and Song Yan find a patient named Lu Xiaoxing who has escaped from the research institute, and they discover that Ge Jun's true identity is a police officer who was captured while investigating the brain science institute, and had the memories of an assassin implanted in him. Ge Jun returns to the laboratory for a final battle. Killing his wife and best friend, and falling in love with his sister, has caused him great pain. With the help of other awakened patients, he defeats the bad guys at the laboratory and witnesses a long-awaited total eclipse. Ge Jun disappears from this world, and no one knows where he went....