The bishop

Two children by the lake: he is a bold swimmer, she is a nerd.
Always arguing about what to do: bath or chess. He, impatient, doesn't know how to play, and when he discovers that she will have to move far away he throws the chessboard into the lake.
To make up for it, he promises to find all the pieces and starts fishing them out every day. But time is running out, she has to leave and the last pice, the bishop, is still missing. In a desperate attempt he risks everything and dives into the night.