On the night when his mother was critically ill, delivery boy Chen Fu saw a life debt note: he was the debtor, demanding thirty years of his life. In order to save his mother, he became a life debt collector, collecting debts for the dead and tracing the black market in life expectancy. But all the IOUs point to his father's disappearance and the city's original contract - he wants to recover the lives of ordinary people who are not priced.
