Bell is an 11-year-old boy who has lived his entire life in the American Mars colony. When a mysterious illness strikes the adults, Bell and the other kids must break all the colony's rules to seek help from the other international settlements they've been forbidden to contact. As they venture across the dangerous Martian landscape, they discover shocking secrets about their home and learn that survival depends on cooperation, not isolation. This thrilling adventure explores what it means to be a family and a community in the most unexpected place.