One day a courier left an envelope without a return address. Inside, a single line: Thank you for saving my mother's last dance. The accompanying microchip contained dozens of other one-megabyte wonders: birthday candles frozen in mid-flicker, a first bike ride, a quiet funeral with too few attendees. He patched them all, like a dealer of second chances, until the stack of restored moments outgrew his stall and spilled onto the street like a parade.