Jaden and Syrus are having an argument, when suddenly a submarine arrives at Academy Island. The captain of the submarine claims he is here for a duel. Jaden believes he is one of the Shadow Riders and duels against him on board of the submarine. It turns out that the captain is in fact not a Shadow Rider at all; it was just a misunderstanding. His dream is to build an underwater Duel Academy and he wants Jaden to become a teacher for the school since he is such a powerful duelist. The submarine leaves the island with Jaden still on board. He wins the duel but his friends were told that he stayed so they left on the boat for the island. Syrus is sad that the last thing he did with his friend was fight with him. However, a week later, Jaden returns to the island, explains what happened and Syrus cheers up.