When their sister Charlie is kidnapped by poachers, Betty, Fliss, and their newfound friend Willow embark on a high seas adventure involving ghosts, fierce pirates and a journey to a mythic island that only exists in legend.

"It should have been a fresh start for the Widdershins, finally free from the misty gloom of Crowstone and beginning a new life. But all is not as it seems in their postcard-pretty village ... The Widdershins sisters have their own secret: a set of enchanted nesting dolls with the power to render their user invisible. The sisters must use their wits--and their magic--if they're to break the dark hold over the village, and save one of their own ......