Lost Friend, New Friend

Jack, a 12 year old boy has no friends, he was always known as the "odd one out." But that changed one day, he got neighbors and he made a friend. Her name is Harley, they are very close. Then, one day everything turns from good to bad in an instant. Harley has a accident and dies, what will Jack do? He's lonely again until he gets new neighbors and they adopt a girl of his age. Not any girl though, Harley's twin sister to be exact. In that thought, Jack thinks that they'll be good friends but the more he learns about her the more suspicious he becomes. They end up on an adventure together and he eventually learns to trust her and they become good friends, just as good as Harley and him.... maybe even better.