Over a fairly measured (slow?) 2 hours, he tells the tale of 2 female vampires, who are able to exist in sunlight, and blood-let as much through a fang-like nail as with the more traditional teeth. There are strong themes of men exploiting women for sex, and women getting their own back.
Gemma Arterton and Saoirse Ronan are great in the leading roles, both vulnerable and defiant in their own way, but none of the supporting characters do very much to provide a strong counterpoint for their story, which means it can all flag, more than a little.
There are some excellent scenes and a lot of craft in the film-making, but it perhaps feels like less than the sum of its parts...
About that shrine, I found it intriguing that such a fantastical and ominous facility would exist on an island outpost far from human habitation. It isn't a device used in any other vampire myth or story of which I am aware.
There are no scares here, only drama and dark fantasy. It's nearer the art house end of the horror spectrum. I do recommend it.
This, I felt, falls somewhere in between.
These vampires can walk around in the day, and are centuries (2) old, but the film is more about vampire angst (never thought I'd say those two words together!) than what you would normally think.
Slow moving and creepily eerie, but doubt I'd be in an hurry to watch it again.