Boston, 1926. Francis Thurston goes through documents left behind by his grandfather's brother, recently deceased under mysterious circumstances. He soon discovers the existence of a cult that worships ancient and unspeakable horrors. Mysterious murders, blood rituals in the depths of the Louisiana swamps, artists who descend into insanity after nightmarish visions, and a Cyclopean city that rises from the sea. Step by step, Thurston realizes that his relative's research got too close to the truth. In the shadows, there are those who want to wake the sleeping god Cthulhu in order to spread madness and destruction over the entire world. The stars are right. Is the end near?