Struggling to maintain his clout as leader of the Mithraic, Marcus begins to make decisions that disturb his family, while Mother's ability to see him for who he truly is threatens his power and puts her in a precarious position. With Tempest on his side, a strong-willed Campion finds himself at dangerous odds with the Mithraic.

Sue is determined to keep the children safe, and in doing so, struggles with whether or not she can trust Mother. Meanwhile, a new threat arises and an increasingly erratic Marcus causes the Mithraic to question their leader.