Science fiction. The journey

In this short science fiction a town on Earth is completely destroyed after its collision with another planet. And in this town, that now has been abandoned by the authorities, only one person survives. This survivor is visited by a stranger, and the old man ( the survivor ) does not like his presence around him. This visitor is actually on a secret mission and that has something to do with Planet Earth and the only person who survived when an alien planet collided with Earth. The visitor makes an offer to the old man. An offer that could change his life forever and also ensure Earth evolves for the good of all. To know whether or not the old man accepts his offer, read this short and thrilling science fiction.