In this optimistic Italian children's movie, a little boy and an old man work together to rescue a huge white dolphin from the ruthless one legged millionaire Markoff's swimming pool. Naughty Snowball (dolphin) encountered trouble while escaping into the beautiful Greek Sea and jokingly swallowed the pension record owed to elderly cruise artist Billy Bolla. If the performer cannot quickly catch Snowball and induce him to take out the documents, he will not retire. He met the clever Theo, the son of Markov's maid. Theo really likes Snowball and wants to let him go. He and Billy became friends and together they designed a clever plan, including a bus filled with water~