Agnar found a book with a blank name from his father's relics, which recorded a lot of information. When Agnar tried to read it, he unexpectedly came to a mysterious world where the gods that had disappeared in the original world and the dark abyss that existed in the original world existed. But at the same time, Agnar found that his life had fallen into a countdown, and only by completing the tasks that appeared in the blank book could he extend his life.