In a town where the rate of disappearances runs several times the national average, two young men are drawn separately into the same dark mystery. Kurusu Yuuma has been searching quietly for his sister-figure Akizuki Kaname since she vanished, slowly becoming entangled in something much larger than a missing persons case. Takanashi Shin'ya investigates the phenomenon of spiriting away in hopes of helping Akesaka Touka, who suffers from a mysterious illness tied to the same events — and comes face to face with paranormal forces he is not prepared for. The iron will of two boys is about to lay bare the darkness lurking in the heart of this city.