Grace and Tom Penderford are the luckiest people alive. They have a wonderful marriage, a comfortable life and a beautiful baby girl, Chloe.

Then, in a heartbeat, happiness becomes despair, and their lives change forever. When three-year-old Chloe falls ill and dies, Tom and Grace's world is ripped apart. As their family of three becomes two, they must find a way to mend each other's broken hearts... and save their marriage, if they can.