The city of Los Angeles has been occupied by an unknown force. Former FBI agent Will Bowman and his wife Katie are separated from their son during the invasion, and are willing to do anything to be reunited with him. When they are offered a chance to get their son back by collaborating with the occupational government, Will and Katie find themselves faced with the toughest decision of their lives.

Will continues to earn the respect of his new colleagues, but when his home comes under an attack, everyone is a suspect- even those closest to him. Meanwhile, Maddie finds a way in to the upper echelon.