The story was interesting enough, and much better than the usual fare in the "nuns + supernatural" genre. The acting was excellent, as well as the script, though a little slow: basically it's a three hour suspense/drama movie, not a series.
The elephant in the room (or behind the palace) was the fake scenery. This could have been a minor flaw in the execution, except that the fake view was heavily featured throughout, with the apparent intent to be awe-inspiring. But it just seemed to be an actual vista inserted onto a green screen behind the palace set, and/or via CGI. And then when certain effects were added to the skyline to further the plot, they looked hopelessly amateurish and even more fake.
The elephant in the room (or behind the palace) was the fake scenery. This could have been a minor flaw in the execution, except that the fake view was heavily featured throughout, with the apparent intent to be awe-inspiring. But it just seemed to be an actual vista inserted onto a green screen behind the palace set, and/or via CGI. And then when certain effects were added to the skyline to further the plot, they looked hopelessly amateurish and even more fake.