Vash, Milly, and Meryl are travelling from the sand steamer aboard a bus toward another city. Vash regrets paying Milly and Meryl's fare to come with him. Suddenly, the bus comes to a halt and a lone young man, who was stranded in the desert nearby (spotted by Vash), gets rescued.
In the bus, the rescued gentleman introduces himself as Wolfwood. He tells everyone he's a priest and is stunned that the one who first spotted him was THE Vash the Stampede.
The bus stops along the way and Vash and Wolfwood get out to stretch their legs for a bit. Wolfwood tells Vash that he's travelling to make money for the children of the orphanage he works at back home. Wolfwood then gives some food to two starving children aboard the bus. Vash gives a warm smile in response to this act of kindness and Wolfwood comments that it's the first time he's seen Vash *really* smile, he thinks Vash normally just pretends to smile to cover up his inner pain.
Humorously enough, Wolfwood carries a miniature church that he places on people's heads to act as a mini-confessional. (Though you have to put money inside the confessional to make it work.)
Suddenly, as Vash and Wolfwood are talking, someone runs and tells them that one of the passengers, Eric, has gone crazy. The two rush to Eric and see that he is wounded. Vash comments that his wounds could not have come from a human. Just as he says this, a giant robotic spider appears in the distance.
The spider charges toward the passengers and Vash shoots it (to no avail). Milly then fires her own weapon at the spider and takes it out. But over a dozen more come rushing in!
Everyone runs into the bus and it takes off soon afterward. Everyone breathes a sigh of relief, except one mother who yells that her little daughter was left behind. Vash and Wolfwood immediately jump out of the bus and prepare to save the child. Wolfwood left his weapon behind though so Vash tosses him a small knife to take its place.
Vash and Wolfwood hide behind large rocks. Vash begins telling Wolfwood about how the spiders work but Wolfwood ignores him and jumps in to attack one. The priest's knife breaks immediately upon impacting the spider. A few seconds later, he is running away from a lot of them.
All at once, the spiders begin to fall. Vash figured out their weak point. He simply shoots each one's heat sensor, making it unable to function anymore.
Vash and Wolfwood run toward the crying little girl who is sitting far in the distance. They mistakenly fall into a sand trap on the way though and end up in an underground area. As they are looking around, tons of spiders appear and give them chase. As they are running away, Wolfwood yells to Vash that everything's his fault. Vash tells him that they are on a ship that crashed in the past.
After gaining refuge in a small room, Vash and Wolfwood charge out, take out some spiders and enter the ship's inner room. The inner room turns out to be a plant that is producing spiders en masse. Vash gives his gun to the priest and jumps into the middle of the room, among all the spiders. The priest gives him strong support (being a very good shot). Unfortunately, the priest runs out of bullets.
Both Vash and the priest are about to be incinerated by a couple of spiders. Mysteriously, and we don't see how this is done, both the spiders get fried. The priest looks at Vash and is disbelieving, wondering how he did it.
Vash and Wolfwood enter the ship's central control room. Suddenly, the roof begins to puncture. A hole opens in the roof of the ship and Milly and Meryl's faces appear.
The next scene shows everyone safe on the bus. Wolfwood goes and sits next to Milly, leaning against her to sleep. Meryl then sits next to Vash.
The next day, the bus arrives at its destination (May City). Wolfwood and Vash part ways.
