The group of five make it out of Egypt and to the ocean where they are passengers on a ship. The ship is destroyed by the bad tempered Neptune and the group finds themselves in an underwater city where there are air bubbles to breathe in and even when there are no air bubbles present they find they can breathe water. The group soon realize that their host is the ever grouchy Neptune and realize that they must escape soon. They set out only to find Neptune and his army of mermen hot on their tail. They find another underwater city. This turns out to be Atlantis and to there great surprise it is governed by another person from the real world. How did this person get here and can they ever make it back to dry land?