Following the death of his wife, a young father [Benedict Cumberbatch] sees his hold on reality crumble, and a strange presence begins to stalk him from the shadowy recesses of the apartment he shares with his two young sons. A man-like crow, seemingly brought to life from the father's work as an illustrator, is about to become a very real part of all of their lives, ultimately guiding them towards the new shape their family must take.