The male protagonist Alan Gray, as an ancient book restorer, accidentally came into contact with the secret of the "Sleep of the Old Gods" in the Cthulhu mythology while sorting out a mysterious manuscript, and was involved in a series of strange events that cannot be explained rationally. In the process of pursuing the truth, he faced the boundary between reason and madness, the insignificance of human beings and the horror of the unknown, and finally made a choice between "knowing" and "forgetting", completing a struggle about survival and humanity.
