Instead of sacrificing Mars, Emon launched a series of nano-satellites that formed a 'Magnetic Mirror' around the Earth. As the asteroid hit the mirror, it didn't explode; it was slowed down and captured by Earth's orbit. Emon turned the threat into a resource. The asteroid was rich in rare minerals, worth quadrillions of dollars.
By saving the world, Emon had effectively bought it. He was now the 'Grand Chancellor of the Solar System.' Money had become meaningless. He started the 'Great Restoration,' using his robots to clean the oceans and regrow the forests of Earth in months. The sick youth who couldn't walk was now a legend who had saved two planets. But in the middle of his triumph, a secret message arrived from a deep-space probe. It wasn't a natural phenomenon. The asteroid had been sent by someone. Or something. The billionaire realized that the universe was much more crowded—and dangerous—than he thought.