Every day in Minor Universe 31 people get into time machines and try to change the past. That's where Charles Yu, time travel technician, steps in. He helps save people from themselves. Literally. When he's not taking client calls, Yu visits his mother and searches for his father, who invented time travel and then vanished. The key to locating his father may be found in a book. It's called How to Live Safely in a Science Fictional Universe, and somewhere inside it is information that will help him. It may even save his life.