In AD 3066, the most famous mecha master, Faris, died in an explosion in a mecha war. At the same time, in Frankfurt, Germany, in 2004, the young lady of the Nodel family woke up. However, who can tell her that she is just going to her grandmother's house in the United States for a vacation, why is the child next door named Sam, and why does the white Bugatti Veyron in her name turn into a yellow Chevrolet overnight? Why does this big guy call himself Optimus Prime? She just wants to go home, she misses her mechas!