Grandpa and Noah are sitting on a bench in a square that keeps getting smaller every day. As they wait together there, they tell jokes and discuss their shared love of mathematics. Grandpa recalls what it was like to fall in love with his wife, and what it was like to lose her. She’s as real to him now as the first day he met her, but he dreads the day when he won’t remember her. Sometimes Grandpa sits on the bench next to Ted, Noah’s father; in their love of Noah, they have found a common bond. Grandpa, Grandma, Ted and Noah all meet in this peculiar space that is growing dimmer and more confusing all the time.