'Happy Death Day' Reimagines 'Groundhog Day' as a Grisly Slasher Horror

The concept behind Happy Death Day is simple enough: take the premise of Groundhog Day--a protagonist must endlessly relive the events of one day ad infinitum until they solve a deep-seated issue--and refract it through the lens of slasher horror. In this case, protagonist Tree Gelbman--yes, her name is Tree--must relive one day--her birthday--over and over until she can solve her own murder. The trailer showcases a dark, self-aware sense of humor and sprinkles in some terrifyingly masked figure...