Alternate

Gill Smith an assistant of a famous detective from Fenelbert agency, finds himself killed and thrown in a different alternate world from the past where mysteries, secrets, and unknown powers hides in the shadows. Demons, Devils, Ancient Calamities and Abominations, even fallen angels and gods, just remaining out of sight from the public masses.

Gill had entered the body of Clad Lestin, unfortunately for Gill, the previous owner of the body died by revealing a secret that should obviously not be shared, an obvious problem for Gill, as not only would that mean he was part of a group that monitors unknown. It also meant that there's a high possibility someone from that group will recognize him and hunt him down till his last breath, for fear of the problems he might unknowingly cause. Thus, a difficult and troublesome life he would live.