Optimus, damaged in Mexico City and disguised as an old Marmon 97 semi-truck, is discovered in an abandoned theater by Cade Yeager, a financially struggling Texan inventor, and brings him back to his farm. While his teenage daughter Tessa and business partner Lucas Flannery encourage him to turn Optimus over to the authorities after realizing what he really is, Cade instead fixes Optimus, hoping to understand his technology and unexpectedly revives him. Still skeptical of Optimus, Lucas calls Cemetery Wind, who attacks and destroys the farm, but Optimus and Tessa's boyfriend, Irish rally car driver Shane Dyson, come to the family's aid. While on the run from Cemetery Wind and Lockdown, Lucas is killed by one of Lockdown's grenades. Escaping into the desert, they take refuge in an abandoned gas station. Later, Optimus gains an alternate form after scanning a passing Western Star 5700 XE Phantom Custom truck with the original red and blue paint with flames and summons the surviving Autobots – Bumblebee, who has assumed an alternate form (a 1967 Chevrolet Camaro), Hound, Drift, and Crosshairs – who have come to distrust humans due to Cemetery Wind constantly hunting them down. Using a CIA drone which he stole during the home invasion, Cade discovers K. S. I. 's involvement in the attacks on the Autobots. Optimus vows to personally kill Attinger for his actions against his brethren.