In 2030, in Maple City, assassins Ge Jun and Song Yan received a mission to organize the assassination of journalist Meng Bai. During the assassination process, Ge Jun constantly had fragmented memories with Meng Bai in his mind, and in Meng Bai's room, he found himself withHis group photo, Ge Jun began investigating his identity. The investigation direction points to an Alzheimer's Institute and it is revealed that the institute is actually a brain swapping institution serving the wealthy. After several twists and turns,Ge Jun and Song Yan found the patient Lu Xiaoxing who had escaped from the research institute and learned that Ge Jun's true identity was a police officer. He was arrested while investigating the Brain Science Research Institute and implanted with the killer's memory. Ge Jun returns to realityThe laboratory fought its final battle, killing his wife and close friends with his own hands, falling in love with his sister, and other memories that left him heartbroken. With the help of many awakened patients, he eventually defeated the bad guys in the laboratory and witnessed the long-awaited total solar eclipse. Ge Jun disappeared from this world, and no one knows where he went.