VESPER

Isaac was once a mercenary. During a mission, he spent the night in an abandoned temple, where he found a thick tome hidden under an altar. The moment he opened it, the knowledge of an unknown being--of which he could only see a floating eye--flowed into him, merging with his personality: Vesper the occultist was born.

Cut to about three years later, Vesper, now working for the church in unraveling paranormal activities, receives a call to investigate a mysterious disappearance in a remote village. Upon arrival, he immediately saves a young woman named Claire, who has been accused of being a witch responsible for the disappearances.

Worrying that Claire won't be safe in the village with her peers, he takes her to the abbey at the top of the hill, where he decides to start the investigations.

With Claire joining him, they arrive in front of the abbey only to find it closed and with no signs of life. Not giving up, Vesper decides to find an alternative route to get in...