Song Huan owed debts to seven creditors. The Blood Debt creditor wanted him to suffer, the Name Debt creditor wanted his name, the Time Debt creditor wanted his time, the Promise Debt creditor wanted his word, the Love Debt creditor wanted him to let go, and the Life Debt creditor wanted his life. The seventh creditor had no name and no shape. No one acknowledged it, yet everyone wanted it. In his pocket was an account book shattered into seven pieces, each of which could let him borrow a creditor's power. Every use added another debt. With five teammates, each carrying a blade of their own, he traveled between the seven collection offices, taking on debts for others, transferring them, and dodging repayment. He thought he was exploiting a loophole. Later, he discovered that the rotten debt the seven creditors owed one another was the biggest loophole in the world. He decided to make the seven creditors fight first. The stake was himself.
A debt can never exceed seven, and it can never go overdue. But there are some people whose debt you repay with your own life.