When Lifter blows out the candle on her birthday cake, Cosmo and Sol finds she has amazing wind power. Sol loves wind! Lifter's gift is some wallpaper and some time alone to decorate her room, so the family head to Neptune in search of some real wind. On Neptune, Dad reveals he has brought just the thing for a windy planet – a kite. But the wind is so strong, it lifts Dad, Cosmo and Sol into the air. They have to find somewhere soft to land so they can get back home and find out just what Lifter has done to the Moonbase.