St. Agatha has a few things going for it, on the surface: creepy poster, nuns, single mother-to-be without friends. Any number of paths to follow down the horror world, and I was willing to follow.
Instead, it's more of a drama with some psychological thrills with some gruesome (cheap) shocks.
The movie tries to show you how spooky the run-down old convent is when Mary has to walk alone up a narrow path and she encounters a wolf trap. Then the other pregnant girls are kinda sketchy. The house mother is a battle axe of a bitch, and mother superior just looks mean.
Little things start happening to make Mary want to leave, and she's convinced to stay. Then is drugged and tortured. It really doesn't get any better, nor does it make any more sense.
There is very little explanation given. Hints of torture and murder are laid out, with Mary seeing things she shouldn't, but then those threads aren't resolved. And when the big reveal comes, it's a complete let down.
The ending is unsatisfying. There was gratuitous gore and violence. Character motivations were thin at best. I was bored the whole time, and really hated the end.
Don't waste your time with this one. Find The Devil's Door and watch a much better version.