The Road Back

On a fantasy world, in the early 16th century something inexplicable happens. Later in the late 19th century a man is trying to make sense about what happen after reading a series of diaries and starts writing his own diary to keep track of his research.
The journey will take our protagonist into a series of trials where he`s gonna uncover the truth but also the truth and the nature of his journey are gonna take their tool and change him.