After a harrowing escape made possible by the sacrifice of the heroic Sam Chapman, Derek Stevens and Janice Boyd begin new lives in hiding. As Luke and Teresa, they dedicate their lives and medical skills to serving the residents of the secret world which has sheltered them. But that world is shattered by a treacherous betrayal, leading to an unexpected attack on one of their beloved families. When the recovery of the lost members brings them into contact with a secret and savage operation preying upon the most vulnerable members of society, they come up against diabolical cunning and mysterious forces. Eventually they find themselves facing a brutal criminal family and its sinister allies, which they must defeat to liberate a group of enslaved workers.