Natalie has never been a fast runner. She's only on the track team because her sister, a varsity runner, put in a good word with the coach. So Natalie's shocked when her speed suddenly increases on her sixteenth birthday. Soon she can run faster than humanly possible! But the more races she wins, the more arrogant she becomes. With this new attitude taking a toll on her relationship with her best friend on the team as well as her sister, Natalie must decide if the super speed is really worth it.