A priest who commited more sin that was good for him. What will be his fate? Let God and the Devil decide. Maybe they're even helping you a bit. A sweet Christmas time story :)
It's a strange game though. Storywise, it's very confusing up till the end. What's 'real', what's imagination. A lot of unanswered questions. It's also not really a horror. Sure, weird things are happening, but nothing is scary. What it is though, is fantastical and beautiful. The world, both real and imaginary, is very detailed and colorful. You can see they put tremendous work in designing objects and textures.
As far as puzzles go, they're all pretty easy. Mostly finding items and using them at the proper place.
Personally, I think it was a cool game to play. If you're looking for actual scares, this ain't it. It's basically a very beautiful, weird and interesting walking sim.