Happy Death Day 2U is a 2019 American science fiction black comedy slasher film written and directed by Christopher Landon. The film was released in the United States on February 13, 2019, by Universal Pictures. Critics praised Rothe’s performance, as well as the film’s shift to a more sci-fi happy valentine day 2021 date, although some noted it as derivative of the first film. A third film, Happy Death Day to Us, is in active development.
College student Ryan wakes up in his car on September 19. Returning to his dorm room, he walks in on his roommate Carter and Carter’s girlfriend, Tree. He resumes work on an experimental quantum reactor with fellow students Samar and Dre. After Bronson, the school dean, shuts down the project for causing several power outages, Ryan is murdered by someone dressed as school mascot Babyface and wakes up again on the 19th. Tree wakes up in Carter’s room on September 18 and relives her original time loop, but she soon realizes things are different after discovering that Carter is now dating a nicer Danielle. Ryan theorizes that the reactor caused Tree to drift into another dimension.
When Tree learns her mother is still alive in this new reality, she wants to stay. That night, Tree goes to the hospital to intercept serial killer John Tombs before he escapes, but she is confronted by a police officer. The killer kills the officer, and Tree runs into Lori at the elevator, realizing Lori is not the killer in this reality. Lori tells Tree that the killer cannot be Tombs because she just took him in for surgery.
The killer stabs Lori, then chases Tree to the roof, where she accidentally falls to her death. The group finally discovers the correct algorithm, but a technical issue forces a delay. Faced with a choice of which reality she wants to be in when both time loops close, Tree decides to remain in the current dimension. Carter urges Tree to consider the consequences of living a life that is not truly hers and states that her experience with grief helped shape the person she is now. Bronson confiscates the reactor before the group can activate it. Believing she is too weak to survive another loop, Tree insists they retrieve the device.