Twenty-four years after losing her daughter in a tragic accident, Carol Denman has finally made peace with Katie's father. But releasing her ex-husband from blame and facing how deeply she held herself responsible were only the first steps in Carol's journey toward peace.

With the pain of her failed first marriage behind her, Carol is determined to mend her broken relationship with her mother. But she soon discovers she isn't the only one who has been hanging on to bitterness. A road trip to face the past leads Carol's mother, Judith, to unearth the seeds of past mistakes and deep resentments in ways neither of them would expect.

The roots of family animosity run deep and thick. While Judith seems hesitant to start digging, Carol commits to pruning away the thorns of the past so she no longer has to live a life without flowers.