Tree Top Down: Where's Johnny?

The old man wanted nothing more than to live out the remainder of his life in the peace and quiet of his secluded cabin in the trees. That changes when he rescues a young girl, a cute, green-eyed redhead, from certain death. Attacked by a band of city dwellers intent on mayhem, the young girl stumbles into the old man's world. Her presence, her appearance, triggers a long since forgotten life the old man had no desire to remember. While he can help her heal, can he heal his own past?

Who is this young girl? What is her connection to the old man? And who is this old man? Why did he isolate himself from the rest of the world? What or who is he hiding from?

This follow up to Great Plains answers those questions and others including the most important: What does any of this have to do with Johnny Stockton?