A photograph arrives at Inês's studio with no return address, showing a street in Porto she recognises from a childhood she rarely discusses. On its back is a date, a name she has not heard in years, and nothing else. Following the image leads her to a collection of unclaimed film negatives left behind in a shuttered photography shop. As she studies the frames, a familiar figure appears again and again at the edge of the pictures, drawing her into a mystery that challenges everything she thought she remembered.