Time Cut

Lucy Field (Madison Bailey) accidentally time-travels to 2003, two days before her sister Summer's murder by a masked killer dubbed the Sweetly Slasher. She enlists the help of Quinn (Griffin Gluck), a local student and physics whiz, to prevent the tragedy from occurring. Along the way, Lucy discovers that Quinn is in love with Summer, who eventually comes out as a lesbian, and together they work to save Summer from the killer. The film's time-travel plot unravels, leading Lucy to electrocute and stab future Quinn to death before deciding to stay in 2003 to live her life with Summer and Quinn.