Twelve-year-old Marigold Lafleur is the last of a long line of aromages: witches who blend scents into practical charms using aromagic. But ever since a terrible accident injured her father and damaged Luna Island, Marigold and her sisters, Birdie and Lou, have vowed to abandon their family legacy and mama's way of life. Shunned by their neighbors and overlooked by their parents, Marigold relies on her big sisters above all else.

But when Marigold discovers a secret curse that threatens her family, her sisters can't stop the impending danger. It's up to Marigold and her best friend, Sam, to uncover the origins of the curse and break the spell. To do so, she must learn to trust her instincts and believe in her own unique magic or risk losing her sisters forever.