When Megan loses her beloved husband, Rick, in a tragic car accident, she feels like it’s her own life that has ended. She feels too young to be a widow. Walking around the house that had been their home – so quiet without him – nothing feels the same.

But at his funeral, she sees a face she doesn’t recognise. A heavily-pregnant young woman, with a sweet heart-shaped face that is somehow a little familiar. This stranger introduces herself as Emily, Rick’s estranged sister. She explains how she’s been searching for her brother for years, but – as she bursts into noisy sobs – she knows she’s too late now.

Megan finds herself taking pity on the sister-in-law she’d never met. And quickly Emily becomes more and more a part of her life, even moving into the spare room of her house.

It feels less empty than before. And at first it’s comforting to Megan. But – even when it’s a relative of the man you loved more than anyone – can you trust a stranger?