Living with the consequences of her choices in the past, Athena Belle Witwicky is gradually returning to her pre-Juvie life. Going to High School, going to the mall, and arguing with her family isn't all it's cracked up to be. One day, as a reward for good behavior and a promise to her twin brother, Samuel James Witwicky, from their father, they received a car that holds many secrets. Their visit to Bobby Bolivia's car lot turns out to be the most impactful day of their lives. When two races of robots, the good Autobots and the villainous Decepticons, bring their war to Earth, humanity's fate is at stake. The robots can transform into various mechanical objects as they seek the key to ultimate power, whereas Sam, Andy, and best friend Mikaela are the key to saving the world from total annihilation.