In the episode "Treasure Hunt," Fix and Foxi go snorkeling at the beach. While in the water, they discover the remains of a sunken shipwreck. Excited by the prospect of finding treasure, they decide to investigate. Their uncle, Fax, tries to warn them of the dangers, but they are too determined to listen. The boys then acquire diving equipment and go on a treasure hunt, where they discover an antique necklace and a treasure box filled with jewels.
