As Molly works to create a virus that will eradicate alien hybrids, she discovers that aliens are trying to communicate with humans through a hidden message in their DNA. Also, Lucy helps Ethan run away from Charlie in order to help him recover memories of his mother, Molly.
Molly Woods, an astronaut with ISEA (International Space Exploration Agency) is assigned a 13-month solo mission aboard space station Seraphim. She returns home to her husband John, a robotics engineer who created their son Ethan, a prototype android called a "humanich". When Molly discovers that she has mysteriously become pregnant despite years of infertility, she begins a search for answers.