Children's drama series about a 14-year-old girl who is given a magical coin that makes all her dreams come true. Harmony and Melody are living with their Aunt Glenda on a canal barge, uncomfortably close to Grobbler, a scrap metal merchant, and his revolting son Gus. Harmony discovers Dino, a cheeky young tearabout, secretly living in the hold. Dino has found Harmony's magic 50p coin but she refuses to believe that it is able to grant her wishes.