Thirty-six-year-old Gal Garner lives a regimented life. Her job teaching biology and her struggle with kidney disease keep her toggling between the high school, the hospital, and her home on a strict schedule. Only in her garden does Gal come alive, cross-pollinating roses in the hopes creating a brand-new variation of spectacular beauty. Then one afternoon Gal's teenaged niece Riley arrives, unannounced, and neither of them will ever be the same.