While searching for ingredients for Pat's curry, Dingo and Trill encounter DiveMan and follow him to a nearby lake castle. Inside, they discover that two humans, Captain Blackbeard and Yuika, are cooperating with Zoano DarkMan and have taken Iris prisoner. Dingo and Trill infiltrate the castle in hopes of rescuing Iris, but they must battle with Yuika's NetNavi, CircusMan. In the end, Iris is rescued.
