When Shen Yi, an unemployed young man, accidentally touched a mysterious link and entered the "forbidden reincarnation", he was involved in an infinite survival game with the evil god Cthulhu as the background. In every ten-day cycle of death, abandoned mental hospitals, rules written in blood, shadows in the mirror, and tentacle monsters come one after another, and the memories of all players are reset every round.
As Shen Yi teams up with the calm Lin Xiao and the mysterious Zhao Yu to explore, they discover that the core of reincarnation is actually the "Cocoon of Cthulhu" - a strange object that swallows up memories and lives. It is forcing players to dig into the forgotten past with hints of broken diaries and mirror worlds. When the bloody rules of "the guest in the mirror needs three smiles" and the terrifying existence of the seal in the basement are gradually revealed, they are shocked: the so-called survival game is just a "trial in the cocoon" before the evil god wakes up, and the key to breaking the reincarnation is actually hidden deep in the dark memory of everyone's contact with Cthulhu...
In the desperate situation of memory reset and rule strangulation, Shen Yi must piece together the taboo truth within ten days, otherwise he will not only become a puppet in the cocoon forever, but will also awaken the sleeping rulers of the past and plunge the real world into an indescribable abyss of madness. This is an escape that uses memory and reason as a bet, and it is also the ultimate reincarnation of mankind fighting for survival under the shadow of Cthulhu.