Van and Fiona are traveling through the desert again. Van's Shield Liger's leg is damaged and Van wants to find a place to camp for the night. Fiona eats Van's papaya and Zeke notices a Gustav traveling behind them. The pilot of the Gustav is the transporter Moonbay, who looks at the Liger's leg. They decide to camp together, but then are attacked by a large group of Guysacks. They run away and Zeke doesn't have a chance to fuse with the Liger. Irvine arrives to help out and starts shooting all of the Guysacks. He and Moonbay have met before. Irvine gets hit when he's making sure that Zeke is okay and Van helps him out. There are no more Guysacks to deal with, and Moonbay finds a ruined city to camp out in.

Once they get there, Moonbay fixes Irvine's Command Wolf so it will heal faster. She then fixes the Shield Liger. At dinner, Van tells her how he met Fiona and Zeke and asks her about Zoid Eve, which she has never heard of. Van, Fiona, and Zeke then go see if they can find anything useful in the ruins. Irvine talks to Moonbay and tells her that he figures that those Guysacks were sleepers, Zoids without pilots that are programmed to attack certain things. Moonbay tells him that she is transporting Imperial ammo and that's why they attacked. Moonbay is proud that she has never failed to deliver her cargo.

Van goes swimming in a pool of water and finds the remains of a Zoid at the bottom. He tells Moonbay and Irvine while a bunch of Guysack sleepers surround the ruined city. Irvine is about to try to steal Zeke when Van confronts him, but then the Guysacks attack. Irvine tells them that they're in a sleeper trap. The Guysacks that attacked them in the desert wanted to lure them to this city so that they could be surrounded. The Zoid remains in the water was probably one of their victims. Everyone gets in their Zoids and tries to leave. Van and Irvine help Moonbay out.

They all run away and Irvine yells at Moonbay to get rid of her cargo because if the Guysacks score a direct hit, it will explode. Moonbay, of course, refuses. She breaks away from the others and heads into a path through a cliff. After a while she is surrounded by the Guysacks, but Van and Irvine rescue her. They fire at the Guysacks until they run out of ammo. Moonbay comes up with a plan and yells for Van and Irvine to run. She dumps her cargo and runs too and the Guysacks crawl all over the cargo. They cause it to explode and Van cries out for Moonbay because he thinks she died, but then Moonbay appears and tells him that her Gustav has really thick armor. Irvine calls Van a kid a few times and then leaves. Moonbay gets Van to be her protector because she dumped all of that ammo to save him.