In a distant future where a portion of humanity possesses psychokinetic powers called Cantus, young Saki Watanabe finally awakens her abilities and joins a special academy.
Her seemingly idyllic life in the town of Kamisu 66 is quickly disrupted by disappearances and strange encounters with intelligent creatures called Monster Rats, who revere those with Cantus.
Saki and her friends, Maria, Shun, Satoru, and Mamoru, begin to investigate the mysteries surrounding their society, uncovering uncomfortable truths about the past and questioning the true nature of their seemingly utopian world.
Their quest for answers leads them down a path of self-discovery and challenges their understanding of the established order, suggesting a hidden darkness lurking beneath the surface of their perfect society.