When Queen Elizabeth's reign is threatened by ruthless familial betrayal and Spain's invading army, she and her shrewd adviser must act to safeguard the lives of her people.

Paula, her son Carl, and his estranged partner Emily, join family members to mark the birthday of their missing son. As Carl fights to convince Emily to come home, new information comes to light about the missing boy, the implications of which are worse than anyone could have imagined.