In the age of artificial intelligence, it isn't a machine that stops Cal in his tracks—it's a deeply human idea. What if playing a video game could help fight cancer? Thanks to Travis Jennings and a small group of friends, a chain reaction begins—turning gamers with little money of their own into philanthropists. A breakout company called Besitos matches their winnings with donations to the American Cancer Society and bridges the cause to the $60 billion video game industry.