This book explores themes of cosmic horror and the insignificance of humanity in the face of ancient and unfathomable powers. It delves into the mysterious and terrifying existence of the Great Old Ones, particularly the legendary creature Cthulhu, who lies dormant beneath the sea, awaiting the conditions to rise again. The story is presented through the fragmented accounts of various characters that contribute to piecing together the horrifying truths surrounding Cthulhu. It begins with the aftermath of the protagonist's grand-uncle's death, leading to the discovery of a clay bas-relief and his notes that reference a cult worshiping Cthulhu. Subsequent narratives recount the chilling dreams of a sculptor named Wilcox and a police inspector named Legrasse, who uncovers a voodoo-like cult in the swamps of New Orleans that worships ancient beings. This dark web of cults, dreams, and the hauntingly surreal experiences of those who have encountered Cthulhu culminates in an overwhelming sense of dread, leaving the reader to ponder the existential implications of a reality where humanity is not alone and may face awakening horrors.