Charlie loves being a mechanic. It was literally in her blood. Taught by her father, she was prepared to take the most beat-up, rusty, twisted up car and turn it into perfection. What she wasn't ready for; to meet an alien robot disguised as a car who crash landed on Earth, searching for his twin brother. Could this mechanic help this mechanical being find what he's looking for? And maybe...she'll find something in the twin aliens that she wasn't looking for. (Sideswipe/OC/Sunstreaker)