Brilliant, vivacious GP Gemma Foster has her life torn apart when she investigates whether her husband is harbouring a dark secret. The truth will shock her to the core.

Reeling from the secrets she has uncovered, Gemma has a decision to make - but a visit from a surprise patient means she also faces an acute professional dilemma.

In public Gemma plays the perfect wife, while secretly concocting a plan to ensure she comes out on top - only to make new discoveries about the full extent of the secrets that those around her are holding on to.

Gemma is determined to expose Simon at last. But how far will she go to achieve her goal?