Naryecheong, a national secret agency that protects humans from disasters and misfortunes caused by evil spirits.

In attempting to recruit a successor, Naryecheong’s chief exorcist, Yoon Taehee, searches for a ‘gwijae’, someone who has the ability to see and hear ghosts.

One day, Yoon Taehee, while hiding his identity and going undercover, meets a suspicious boy at a high school in a small town in the province…

“By the way, how old are you, friend?”