When the Mithraic kids fall sick with a mysterious illness, Campion suspects Mother is poisoning them and plans an escape. As Mother and Father attempt to prove their good intentions, Marcus and Sue, desperate to get their son Paul back, work to convince the other surviving Mithraic to mobilize a rescue party for the children.

Marcus moves forward with a plan to rescue the Mithraic children, but first he has to find them. Back at the settlement, Campion and Paul bond while on a hunting expedition with Father, and Mother attempts to learn more about her origins.