In 2035, a mysterious "time bank" system appeared around the world, allowing humans to trade life spans freely, leading to serious divisions in social classes. The rich have eternal life and the poor have short lives. Xu Yan, who had terminal cancer, was forced to sell his remaining three years of life in exchange for his mother's surgery fees, but unexpectedly gained the special ability to see through other people's remaining time. Xu Yan became a "time hunter", looking for poor people in slums who had a lot of time left but didn't know it, buying their time at a low price and selling it to the rich, gradually accumulating wealth.
