With all the gazillion planets in the galaxy to choose from, the warring Cybertron races of "Autobots" (the sort of goodies) and "Decepticons" (the sort of baddies) descend on Earth in search of a missing cube. This "allspark" - landed on our planet aeons ago and for many years has been unwittingly in the custody of the always competent US military and their "Section 7" operatives - currently led by "Simmons" (John Turturro). Now it transpires that there is a clue to the location of this gizmo - and that is to be found on the spectacles of the grandfather of "Sam" (Shia LaBeouf), only he doesn...