 Even in a world populated entirely by mechanical beings Rodney Copperbottom (McGregor) is considered a genius inventor. Rodney dreams of two things, making the world a better place and meeting his idol, the master inventor Bigweld (Brooks). On his journey he encounters Cappy (Halle Berry), a beautiful executive  bot with whom Rodney is instantly smitten, the nefarious corporate tyrant Ratchet (Kinnear) who locks horns with Rodney, and a group of misfit  bots known as the Rusties, led by Fender (Williams) and Piper Pinwheeler (Bynes).