Ye Yifan never thought that a "Crimson Book" that fell into reality from a dream would drag him and his childhood sweetheart Lu Cheng into the abyss. When a different world in the 19th century shrouded in blood moon unfolded before their eyes, the two people who were tied to the altar of the cult were forced to face the unspeakable horror in the Cthulhu mythology. Behind the mysterious organization's rescue was a holy book that predicted that he was the "savior" and a sacrificial conspiracy that spanned two worlds. They needed him to solve the annihilation crisis that was about to destroy the other world, but they concealed the cost of tearing apart the barrier of the real world. Sacrifice Lu Cheng? Destroy the world? He chose to activate the forbidden time regression. But when he returned to his peaceful daily life at the desk, the strange words that appeared on the last page of the Crimson Book, and the flash of blood-moon patterns in Lu Cheng's eyes, all warned him: this sacrifice in the name of love is far from over...
