Motherhood can be hell. That's what writer-director Bess Wohl's new feature, Baby Ruby, presents as its hypothesis. It isn't the first movie to do so, and it surely will not be the last. Recent years have seen the conversation surrounding motherhood change to acknowledge its difficulties more and more. Baby Ruby applies a horror slant to the concept and is filled to the brim with compelling, timely ideas. Unfortunately, it never stays in place long enough to see any of those ideas through. Baby Ruby shows plenty of initial promise, but its refusal to follow through on threads and its reliance on basic scares leaves it feeling hollow.