Unlike the others in her town, young Pearl West loves mechs like they were her own pets. But her life is turned upside down when she meets a mysterious new mech who carries a big secret.

Pearl sets out on the cattle drive carrying a big secret. If Six is discovered by her brother or worse, the bandits, it’s all over for Pearl and her new friend.

Pearl and friends stop in a town full of shifty gamblers. When Casey's old mentor shows up, a scheme hatches to win Six for their own. Will Casey stay true to his new friends, or betray them?

Pico lands the group in hot water with the Cheyyone people when he goes hunting for buffalo on their land. It'll take more than stubborn cowboy grit for Pico to make things right.