Rodney Copperbottom is a young robot inventor who dreams of making the world a better place, until the evil Ratchet takes over Bigweld Industries. Now, Rodney's dreams – and those of his friends – are in danger of becoming obsolete.

Aunt Fanny gives a tour of the Robot City Train Station to motley collection of robots, including Fender, Zinc, Tammy, Hacky and an Old Lady-Bot.