Extended: Using their scuba-respirators, the ninja survive the palace flooding but are pursued by Ripper Sharks. Benthomaar comes to their aid and leads them to the hangar bay. As a battle breaks out, the ninja launch the Hydro Bounty. A chase through Merlopia ensues as Kalmaar and his forces try to shoot down the Bounty. The ninja narrowly escape, now with Benthomaar as their new ally.
The ninja are trying to open the gates to escape the Ripper Sharks but fail. One of the sharks breaks through the Ice wall to attack Lloyd, but Nya holds them back with her powers. The door soon opens letting the ninja in while blocking out the Ripper Sharks. The ninja meet Benthomaar, who already knows the truth of what happened. He leads them to the hangar bay, having to lie to some guards to get in. They enter only to find the place full of guards, caught they now must fight their way to the Hydro Bounty. During the battle, Lloyd hops in one of the APS suits and fights a few of the guards. P.I.X.A.L. jumps in the ship and gets to the controls. In the throne room, Kalmaar is talking to Gripe when the Maaray Guards sent by Benthomaar ask what he needed them for. Kalmaar is shocked by this and realizes that Benthomaar is helping the ninja.
Meanwhile, in the hangar bay, Nya, Zane, Jay, and Maya get in the Bounty, continuing fighting guards. Three far from Maya start shooting her from top, but Benthomaar comes to defend her when Kalmaar bursts in the room and orders his guards to attack. Lloyd says he will stay back and hold to the guards off while they escape on the Hydro Bounty. After throwing the guards around for a little, Lloyd is shot by Kalmaar who says that the ninja will regret coming to Merlopia with Lloyd replying that he already does and throws the sword from the suit at Kalmaar. He jumps into the water with the Hydro Bounty and they start escaping, but Kalmaar chases them.
Swimming through the city, Kalmaar tells his guards to throw missiles at the Hydro Bounty, the ninja dodge them, and the missiles hit some rock that make some boulders. Kalmaar repeats his order, but Gripe hesitates and tell the King that if they miss they could hurt other Merlopians. However, Kalmaar does not care and keeps telling them to fire, but they still miss and almost hurt others. Coming near a cave, the ninja try to get there in time to escape Kalmaar, who is at the time shooting missiles at the Hydro Bounty. The missiles are getting close to the ship, but P.I.X.A.L puts some sort of devices out to lure the missiles somewhere else, and when they enter the cave the devices stick on the outing and the missiles close the cave in, leaving Kalmaar blocked off from the ninja, he yells in anger.
After escaping, Lloyd comes in and Nya introduces everyone to Benthomaar. Jay asks him why he is helping them, and Benthomaar tells the ninja Kalmaar's plan. Then Nya tells Benthomaar that they know the location of the second amulet. Benthomaar tells them that they must hurry up to beat Kalmaar and stop him, and Nya tells P.I.X.A.L. to set course for the Island of the Keepers.