In 1993, Robert convinces his college friends he's an MI5 agent. Decades later, a man named David exerts an extreme level of control over a family.

As Robert continues to exploit and ruin lives, the authorities set a trap in London. Meanwhile, in the present, Sandra's children hold out hope.

The father of an early victim raises the alarm with authorities about his daughter's safety. Decades later, the police chase down a bizarre lead.