When billionaire satellite tycoon Noel Riche announces his latest project, the whole world tunes in - including brothers Cass and Micah. But Riche's scheme is to rain asteroids on the planet until he is given absolute power - and there's nothing anyone can do to stop him. Or is there? As the brothers flee a hail of meteors that demolishes their school, they are intercepted by an amazing time-travelling supercar, sent back from the future by their older selves to recruit them for a crucial mission. They must travel back to the 1980s, befriend Noel Riche as a child their own age, and put right what once went wrong - all the while pursued by sinister agents from Riche's dystopian future.