The red eye sees what you can't, and every ghost has a reason for staying behind, usually a reason that gets people killed. Yakumo doesn't solve mysteries; he translates the dead into evidence, which means the real horror isn't the supernatural, it's the humans who'll murder again to keep those ghosts silent. You're watching a girl stumble into cases where talking to the dead is only the first problem.

Haruka Ozawa's second year of college turns frightening. One friend is possessed, another takes their own life, and Haruka fears she could be the next victim. She turns for help to Yakumo Saito, an enigmatic student born with a red left eye that lets him see and talk with ghosts. Yakumo believes spirits remain tied to this world by some cause, and that removing it lets them rest. Together, the pair take on cases where killers are willing to strike again to keep the dead quiet. Yakumo's police contact and an investigative journalist also turn up in their investigations. The series blends horror, mystery, romance and the supernatural.