From itch.io:
Once belonging to a wealthy and noble family of ill intent. Legend tells that one fateful night, amid Samhain, the patriarch of the noble family, despite all his worshipping and hard work has seen that the fruits of his labour were rotten, and his harvest was spoiled.
He spent his last remaining wealth on an ancient tome, adorned with withered flesh.
Unable to live with this shame, his damaged ego and his failing mind. He drove himself to madness, remaining in the cellar for weeks on end, toying away with rituals he didn't understand from the ancient tome.
No one knows the full truth of what happened next, but the groundskeeper gave the most accurate eyewitness account, as the only survivor of the night. He disclosed that the father, using his woodcutting axe, massacred his family. He hasn't been seen since.