Every seven years, the Rift reopens and releases the Abyssine, a mysterious liquid able to give form to dreams and nightmares. As the world collapses, humanity retreats into its last three city-states, sending expeditions into the Rift to uncover the origin of this power. When the Rift begins to open far earlier than expected, Mia and Ethan are forced to advance without preparation, journeying toward a forbidden seventh layer said to hold the truth behind the Abyssine and the slow destruction of the world.