Iris Maynard lost her husband in World War II, her daughter to illness and, finally, her reason to live. Walled off from the world for decades behind the towering fence surrounding her home, Iris has built anew family ... of flowers. Iris propagates her own daylilies and roses while tending to a garden filled with the heirloom starts that keep the memories of her loved ones alive. When Abby Peterson moves next door with her family - a husband traumatized by his service in the Iraq War and a young daughter searching for stability - Iris is reluctantly yet inevitably drawn into her boisterous neighbor's life, where, united by loss and a love of flowers, she and Abby tentatively unearth their secrets, and help each other discover how much life they have yet to live.