Mater and Lightning McQueen are ready to rock! When Mater's garage band, Mater and the Gas Caps, records a hit song, Mater becomes a rock legend. Then Lightning joins Mater's band for the rock concert of the century!
In this thriller, television reporter Kate Ryan de Meléndez investigates the death of two radical Puerto Rican activists, whom she begins to believe may have been framed and murdered by undercover American agents.
Mater finds a small UFO called Mator and they have a night out. Later, when Mator is captured by military forces, Mater sneaks up and saves him with the help of Lightning McQueen and the UFO's mother.