"Happy Death Day" is a 2017 horror-comedy film directed by Christopher Landon. The story follows a college student named Tree Gelbman, who finds herself trapped in a time loop, reliving the day of her murder repeatedly. Each time she dies, she wakes up on her birthday, determined to uncover her killer's identity and prevent her own death. The film combines elements of slasher films with a unique twist on the time-loop concept, reminiscent of Groundhog Day. As Tree navigates her repeated day, she learns valuable lessons about her life and relationships, ultimately leading to her character's growth and transformation.