Its Year 2451 and the world is severly overpopulated. Governments and Rulers from all over the world have created a secret scheme called Mission X2, a plan to excecute. All people in the world are divided into 1 of 4 groups. The Higher Class, The Middle Class, The Lower Class, and The Elite. During this horrible time 4 teens from all 4 classes will team up to fight for themselves and the rest of the world.