The duck Lulu is on an adventure around her home by the river. She is particularly taken with the moon, which she would like to befriend. She sees it on the water's surface and swims towards it. But just as she is about to reach it, it disappears. She dives down to it - all without success. Then she sees it in the sky as well. She is astonished and her beak drops open. "What a wonderful bird!" she exclaims excitedly. "It can not only swim but also fly very high!".