Cassie immerses herself in a dangerous undercover assignment, but finds herself seduced into the lifestyle of the people she is investigating. She and Frank discover that Whitethorn House has many enemies, who hate the residents both for the house's history of colonialism and cruelty and the obstacle they represent to the community's prosperity in the present. Rob reaches out to the woman in his recovered memories, but realises he is unable to pursue his prime suspect without giving away the secret of his identity.