In this world, death is not an end, but a property right.
People who have no death certificate will continue to breathe after being stabbed through the heart. They will still be conscious after being burned to ashes. They will sink to the bottom of the sea for thousands of years, hoping to die but not getting it. Eternal life is not a gift, it is the cruelest punishment in this world.
There is only one way to obtain death certificate - buy it.
The rich spend thousands of dollars to buy themselves a peaceful ending; the emperor uses death certificate as the highest reward, and the gift of death is a blessing; countless ants at the bottom sign "mortality loans" and use a lifetime of hard work to pay for a death in installments.
Lu Chen is an unlucky collector. His job is to collect debts from those who cannot repay their "mortal loans" - to take away their death certificates and turn them into living dead who will never be reincarnated.
He thought he was just the humblest cog in the death industry chain, until he saw the woman's death certificate when he came to collect money.
There is a line clearly written on the file:
"This person's death certificate was canceled three hundred years ago. The person who currently holds his death certificate is Lu Chen."
But he has just turned twenty this year.