In the middle of the ocean, a group of pirates capture a special blue egg, which is soon stolen by Jack Walker, a Pokémon Ranger. Jackie escapes with the egg and disappears. While journeying to the next town, Ash and the others get tired and thirsty when they stumble upon a traveling circus who perform using water Pokémon. They easily befriend the people, Lizabeth, Meredith, Kyle, and Ship, and travel with them to the next town. On the way, they discover that they are descendants of “The People of the Water” and they are trying to deliver the egg of Manaphy back to the Sea Temple along with Jackie. Soon, the pirates, lead by Phantom, return looking for the egg. The egg hatches and Manaphy soon becomes attached to May. Phantom reveals that he wants to capture Manaphy so it can guide him to the Sea Temple, and its treasure, the Sea Crown! After escaping Phantom, Ash, May, Brock, and Max must help Jackie, Lizabeth, and the others to bring Manaphy back to the Sea Temple before Phantom gets his hands on it, and the Sea Crown!