It's been two years since Celine lost her daughter Libby. Desperate to escape her grief, Celine throws herself into her work, determined to be the strong, capable woman the world believes her to be. But there's no fooling her family.

A shocking intervention brings an impossible choice: confront her grief or risk losing the family she still has. Reeling, Celine wonders what her life would have been like if she'd chosen her first love instead of her husband and avoided this pain altogether.

Celine wakes the following day and is shocked to realize that what-if has become reality. She's with her high school sweetheart, her daughters aren't quite her daughters, and her home is being rented by the daughter she thought she'd lost forever.

As she reconnects with Libby in this parallel world, Celine is forced to face the problems in her real life: her unwillingness to move forward, the tension that's always rocked her family, and the hard truth that not everything can be fixed by a mother's love.