However, most weeks they also end up bickering about something or other. This particular Sunday he wants to get back to catch the start of the French Grand Prix, while she insists they stop somewhere to buy cat litter. Reluctantly, he pulls into the car park of a large supermarket and waits while she dashes in.
He waits. And waits. But Eden doesn't come back out - she's gone.
When he gets home she's not there either, and none of their friends or family have heard from her. A few days later, and vigorously protesting his innocence, Niall is arrested on suspicion of her murder. When Roy Grace is called in to investigate Eden's disappearance, it soon transpires that nothing is originally as it seemed. . .