Brilliant GP Gemma Foster's life begins to fall apart when she discovers her husband is hiding a dark secret.

Gemma has a decision to make after her husband's dark secret is revealed, but she also faces a professional problem when a patient comes in.

Gemma tries her best to play the perfect wife in public, while secretly plotting her revenge. However, she soon discovers the full truth about the secrets that her husband held.

Gemma chooses to have a fresh start with Simon, but her career is falling apart after a series of complaints.

Gemma finally moves to uncover all of Simon's secrets so that he'll lose everything, and the consequences of her actions are explosive.

Dr Gemma Foster's husband Simon returns to town, two years after she dramatically exposed his betrayals and forced him to leave. His destabilising presence causes her world to fracture in unexpected ways.