John's father Frank (Dennis Quaid) died in a firefighting operation 30 years ago. Once, while looking through his father's belongings, John (James Caviezel) found an old radio used by his father 30 years ago. While flipping through the frequency band, he actually got in touch with a young man named Frank. After a long conversation all night, John determined that time and space were confused, and this Frank was his father 30 years ago. John was extremely excited and successfully helped his father escape the disaster 30 years ago. When he woke up, he was surprised to find his white-haired father in the photo frame, and he knew he had succeeded. However, what is unexpected is that history has been rewritten. John saved his father, but his mother died in a serial murder case many years ago. When John contacted his father 30 years ago again through the radio, intending to let his father stop his mother from being killed, his father unexpectedly became a suspect!