Young, Wild and Free

Have you ever had that one friend that you knew was gonna be there for you your whole life?
Well David used to think that of Carter, until one day she just shut him out. She completely disappeared from his life. They were just kids, no one thought much of it...other then David.
So three years later when Carter comes back into his life suddenly, he doesn't know who she even is anymore. But the events that take place next don't only shock him but also take Carter, by suprise.