After years of wandering from whim to whim, thirty-year-old Charlotte Wheelwright seems to have at last found her niche. The free spirit enjoys running an organic gardening business on the island of Nantucket, thanks in large part to her spry grandmother Nona, who donated a portion of her land on the family's seaside compound to get Charlotte started. Though Charlotte's skill with plants is bringing her success, cultivating something deeper with people—particulary her handsome neighbor Coop—might be more of a challenge. Nona's generosity to Charlotte, secretly her favorite grandchild, doesn't sit well with the rest of the Wheelwright clan, however, as they worry that Charlotte may be positioning herself to inherit the entire estate.