Episode 1
The arrival of new girl Chrissy triggers some alarming behaviour in apparently well-balanced schoolboy Sam.
Episode 2
With the death at the hospital causing suspicion, Sam must tread carefully. Jenny summons the courage to face a threat from the past.
Episode 3
When Sam exposes Jenny's dark secret her world begins to unravel. Sam comes face to face with his father and Jenny finally begins to understand her son's true nature.
Episode 4
With Sam's father released from prison, Jenny makes a desperate effort to get to the bottom of Sam's increasingly dangerous behaviour. But is she too late?
