Iori Midorisawa has always been able to see invisible creatures. He once made a living illustrating these hidden beings, but a traumatic event caused him to abandon his art entirely. Into this stagnant life steps Mika, a mysterious novelist who commissions Iori for a new project. Mika reveals that the invisible creatures are called Unknowns, and he believes that by working together, they can save these forgotten entities. Reluctantly drawn back into the world he tried to leave behind, Iori agrees to illustrate Mika's book. The story follows the uneasy partnership between a wounded painter and an enigmatic writer as they strive to name the nameless and protect beings that most people cannot even perceive. Their journey blends the supernatural with personal healing, exploring themes of trauma, creativity, and the desire to make the invisible known.