Time Cut (2024)

A student named Lucy discovers a time machine and travels back to 2003 on a mission to save her older sister, Summer, whom she never met. That year, Summer and three other young people were murdered by a mysterious masked man. With the help of a boy named Quinn and Summer herself, Lucy will try to stop the killer and change the course of events, facing the dilemma of altering her own existence or solving the mysterious crime that marked her family.