In the end, Peter, Gideon, and Nathaniel go back to the first time traveling event and stop it. The Peter and Gideon once known cease to exist and everything goes back to normal.
At the conclusion of the story, Peter, Gideon, and Nathaniel go back to the initial time travel event and stop it from happening. The versions of Peter and Gideon that were once recognized cease to be, and all events revert to their original state.