Her name was Rose. You watched her die. And her death has created a vacancy.

When Emily lets a stranger step out in front of her, she never imagines that split second will change her life. But after Emily watches a car plough into the young mother – killing her instantly – she finds herself unable to move on.

And then she makes a decision she can never take back.

Because Rose had everything Emily had ever dreamed of. A beautiful, loving family, a great job and a stunning home. And now Rose’s husband misses his wife, and their son needs a mother. Why couldn’t Emily fill that space?

But as Emily is about to discover, no one’s life is perfect … and not everything is as it seems.