Supernatural Investigation Department

As a little boy, Si Mun, the grandson of a famous shaman, gained the ability to see—and communicate with—ghosts. His grandmother gave him a talisman which rid him of this ability and erased his memories of any supernatural phenomena he had witnessed.
Years later, Si Mun is working a hectic, yet ordinary job as a homicide detective in the Korean police force. His grandmother has since passed on, but the powers she sealed away appear to be reawakening...