Ain't love grand? Except, you know, when it's not. Like those all-too-relatable days when routine settles in, when long-worn love drifts apart and finds two partners on opposite sides of a fork in a road, when years of shared dreams turn out to have never been the same dream at all, and when, at your relationships breaking point, a blood-thirsty monster shows up at your door. Ok, maybe that last point isn't so relatable, but in the hands of directors Jeremy Gardner and Christian Stella, it certainly feels that way. The Battery filmmakers (…