The faded paintings.

When Lena keeps having nightmares about paintings with their images coming to her, begging her to free them from their prisons before the paintings crumble, or else she and the world will pay; She dismisses the ideas.
Their just dreams right?
But what happens when she sees them in real life? Crumbling and fading to dust?
And what's with the things stalking her saying they will never let her and the others go?
One things for sure: It's about the paintings.
But time is ticking and Lena might not make it in time to to save herself, the world and the faded paintings.