After living a successful life that others envy, she regains her life just before her mother's death through a sudden regression in time. Suspecting that her mother's death, which she thought was a suicide, might actually be a murder, she tries to uncover the truth and prevent it. However, whenever she manages to save her mother, someone else dies or an even more horrifying event occurs. Furthermore, she begins to realize that she isn't the only one turning back time—someone else is also resetting time to interfere with her.