Houston Williams was thrilled to win a scholarship to attend a space program at NASA. What he didn’t realize was that organizers were recruiting people for a top-secret research project aimed at studying how space travel affects people of different ages. After months spent on the International Space Station conducting a variety of experiments, Houston is surprised to learn that he and his two friends Ashley and Teal have been chosen to join a highly political mission to Mars. But after tragedy strikes, the teens are forced to continue the mission on their own.