Nine-year-old Diana keeps a tally of every day her mother is gone, counting down until she will see her again. A world-renowned photographer, Hannah O'Toole is rarely at home, always travelling the globe, chasing the next disaster. She has missed most of Diana's birthdays, so Diana isn't surprised when her mother announces she will be photographing the effects of a drought in Oklahoma instead of staying in New York for Diana's tenth birthday. Diana is thrilled when her father decides to take her for a surprise visit to spend her birthday with her mother, but she can't fail to see that her mother isn't quite as excited. And when the drought is unexpectedly broken by a Force 4 tornado, Hannah must make a choice between her daughter and her passion.