A car accident caused Nick's fiancee Julia to die seriously.He was heartbroken, but found that he suddenly had the ability to return to the past through time and space.He decided to use this ability to return to the fact that he had changed in the past, and hoped to do his best to save his fiancee's life, but tried again and again always caused a more unimaginable chain reaction. FinallyThere must be a loss of life, and it is full of unknown truth ...