After coming back from death as Reboots and being trained by HARC as soldiers, Wren and Callum have finally escaped north, where they hope to find a life of freedom. But when they arrive at the Reboot reservation, it isn't what they had in mind. Under the rule of a bloodthirsty leader, Micah, the Reboots are about to wage an all-out war on the humans. Although Wren's instincts are telling her to set off into the wilderness and leave the battle far behind, Callum is unwilling to let his human family be murdered. Will Wren and Callum have the opportunity to rebel against their own brothers? Maybe so. They have the advantage of always being underestimated.