在蒸汽动力的冒险中，河船比尔勇往直前，探索未知的水域。三姐妹交换A级小说

　　Riverboat Bill, a young boy named Dave, and a fire-breathing Bunyip have adventures up and down the Murray River aboard their salvaged steamboat in early 20th century Australia, facing outlaws and unsympathetic lawmen along the way.