Three thousand years ago, Qingming split into nine domains. The way of heaven does not judge rewards and punishments in terms of good and evil, but in terms of "karma debt". Humans cultivate martial arts, demons transform into spirits, demons refine their thoughts, Buddhas make vows, and Taoists ask their minds - all five ways can reach heaven, and those who reach heaven must pay back their debts.
A person is born with a life mark, which is hidden in the bones and blood. The strong can borrow lives, seize patterns, and bet on cause and effect. Qing Ming's first forbidden technique is called "Debt Repayment" - using one's own body to repay the debts of Heaven for others. Those who use it will either become saints or turn into ashes.