Mars's colonies are growing. More people are arriving, as are also the challenges to the fledgeling society. Jack Brennan, son of the famous pioneer, David Brennan, is struggling to find his own place in life. His opportunity comes as a dark chapter of his past returns to haunt him. Now a father and husband, he decides to take his family out of harm's reach to the challenging new colony in the far west, Valles Marinaris. His successes will become a beacon for other Benimars to follow. Set years after the first pioneers established successful colonies on Mars, these are the stories of the Children of Mars as they spread to new colonies and take on new challenges.