After a terrible premonition of Chip being killed by mysterious aliens, Con travels to Mars with Lydia and Tel via a space tunnel. After being lured into space, the four children get caught on opposite sides of a war and are forced to make life-changing decisions. With each new species telling them what they should do, the children quickly need to decide who to trust and who to fight. Each decision will take them further apart before bringing them back together as foes. The question is whose side will they be on and who will survive.