2053. Across the world, the occult threat is becoming increasingly visible, and numerous strange events beyond human comprehension are being recorded. As resources on Earth's surface become increasingly scarce, powerful corporations are turning to the uncharted depths of the oceans, unaware of the ancient horror they are about to awaken. In this harrowing thriller inspired by the Lovecraftian universe, you play as Noah and investigate the mysterious disappearance of miners in the depths of the Pacific Ocean. With the help of your AI companion, Key, explore the immense labyrinthine prison of R'lyeh—an ancient sunken city of cyclopean proportions—and attempt to resist the corruption of the mind caused by Cthulhu's influence. At its heart lies a secret that could shake your understanding of reality.