In a civilization composed of vast forests of glowing mushrooms and mycelial networks, wounds bloom into strange plants that reflect emotions. Nightmare Hunter Cillian sneaks into the subconscious of others and hunts down inner demons embodied by trauma. A mission infected him with strange "immortality". Any fatal injuries will be repaired by gray moss, carrying the eternal sentence of memory and fatigue. When he began to laugh uncontrollably, the boundary between reality and dreams was collapsing - the gravity reversed, the walls became virtual, and the destroyed monsters entered reality. In order to find true rest, he must go deep into the core of the fault, only to find that his eternal curse is closely connected with the nightmare of the planet beneath his feet, which is the brain of ancient creatures. Healing oneself may mean awakening or ending a world.