This five-part BBC drama is a seemingly simple story of a woman who suspects her husband of infidelity. But, being crafted by a playwright, Mike Bartlett, the straightforward premise is falsely disarming and is quickly exploited into a much more complicated and dark story.
The lead character, Gemma, is played to jaw-dropping perfection by Broadcasting Press Guild and BAFTA-winning actor Suranne Jones.
A woman suspects her husband of having an affair. After following several lines of enquiries far more unravels including a streak of violence below the surface.