Cora wakes up in the main hall of an abandoned train station. She has no memory of what happened before she woke up, and an ominous silence surrounds the area. It's foggy outside the windows, the doors are locked and something disastrous seems to overtake the building... There are others, lost and confused, like Cora. And there are also the shadows and deformed creatures lurking and crawling in the dark, waiting to draw them into the deep. Will she be able to find a way out?