The protagonist Su Yang travels to a Cthulhu-style world, where he struggles to survive for ten years, and eventually becomes the leader of the "Night Watch" against the ancient gods. When he was hit by the ancient god's spiritual attack, he accidentally traveled back to Earth - only three months had passed. He returned with ten years of combat experience in another world and was covered in scars, and was imprisoned in a mental hospital. No one believed his story until the whispers of the Old Gods began to ring across the Earth.
