Jiang Ye, a night watch intern at a funeral parlor, keeps the lights on for the dead for the last night. Until he took over a book that "keeps accounts" - every time an order is placed, the book automatically displays words, establishes a contract, and writes down a seven-day countdown. If the case is not solved within seven days, the person who established the contract will bear the crime, and the account will be collected with compound profits. While Jiang Ye stayed up long nights in the funeral home, guarding the cold corpses one after another, he faced the threat of debt and death, wandering between murder cases, lies, and the darkness of human nature.
