Alan Gray, 28 years old, was a graduate student in the Department of History. He was forced to interrupt his studies because his tutor suffered a mental disorder while studying "ancient god symbols". He has a rational personality and strong observation skills, but he hides his paranoia about the unknown. In order to escape reality, he accepted the position of lighthouse keeper on the remote island "Forgotten Point", trying to sort out the incomplete manuscripts left by his mentor in loneliness.
"Forgotten Cape" is an isolated island vaguely marked on the map in the North Atlantic. There is a legend about the "Sleeper of the Deep Sea" spread on the island, and fishermen will make sacrifices to the sea on certain nights. The islanders have an inexplicable reverence for the lighthouse, and on the wall at the bottom of the lighthouse, there is a spiral symbol (yellow seal variant) that no one can recognize. The influence of the ancient gods "Dagon" and "Hydra" lurks here, and reason is the only line of defense against the collapse of SAN value (sanity value).