In the second episode of "Metallic Rouge," Naomi and Rouge travel across Mars to Welltown using a commercial transport. The episode introduces various passengers: a wealthy couple with a Nean servant, a journalist named Jill with an optical camera, and a grandmother with two bickering siblings.

During the journey, Naomi tells the children about massive spaceships stuck in the sand, remnants of a war between humanity and the "Usurpers." This narrative contrasts with the "Visitors," extraterrestrials portrayed as friendly.

Unexpectedly, the transport is ambushed by three mercenary tanks. Rouge emerges from hiding and confronts the attackers to protect the innocent passengers. Throughout this ordeal, Naomi and Rouge maintain a lighthearted, playful banter reminiscent of the MCU's style.

Rouge skillfully handles the mercenaries while the grandmother, revealed to be a retired driver, demonstrates her driving prowess. They manage to escape the mercenaries by taking refuge in a forest, marking a stark shift in the episode's setting and tone.

While Naomi and the driver head to a military facility to repair the truck, Rouge stays behind with the other passengers. During this time, Emily, the younger sister, is encouraged by Rouge to take up photography. However, Emily accidentally activates a dormant "Cylinderhead" robot, a relic from the war.

The reactivated robot becomes a threat when the mercenaries return and attack it, only to be destroyed by its powerful defenses. The out-of-control robot then targets the truck carrying the passengers.

In a dramatic transformation sequence, Rouge switches to combat mode and faces the robot. In an intense battle, she succeeds in destroying it and saving everyone in the truck without visibly damaging the vehicle.

The episode ends on a positive note as Rouge, acting independently and not on Naomi's orders, shares her chocolate with Emily as recognition for her photography efforts. The journey continues to Wellstown, with hints that Rouge—especially in her red combat mode—is still being pursued by an investigator named Ash.