This review may contain spoilers. I can handle the truth.
Just as Edge Of Tomorrow takes Major William Cage from Arnold Rimmer to... well, Tom Cruise through repetition, so this horror comedy gradually turns Jessica Rothe's Tree from First Girl To Die, to Buffy Summers. The only trouble is that it has two more endings after that. It's a lot of fun and features an A-plus montage, but the whodunnit over-complicates it a little.