Riley Brown is a regular teenage girl, except for the fact that she is able to to go back in time and change her past. Jay who is a concerned friend is the only person she has told about her time traveling ability. When going back or 'rewinding', Riley takes physical damage to her body such as head aches, nose bleeds and even coughing blood. She also risks altering other events she did not intend to. Over the series she learns that she can't always change the inevitable with her abilities, but still tries to.