"A heartwarming story that will change the way we all see math, baseball, memory, and each other. She is a housekeeper by trade, a single mom by choice, shy, brilliant, and starting a new tour of duty in the home of an aging professor. He is the professor, a mathematical genius, capable of limitless kindness and intuitive affection, but the victim of a mysterious accident that has rendered him unable to remember anything for longer than eighty minutes....