On a poor farm surrounded by marshlands, six sisters - Grace, Willa, Freya, and triplets Deedee, Darcy, and Dolly - live in fear of their father. Their beloved grandmother tries to protect them, but the future seems bleak. When the Full Moon Fayre makes a rare visit to Hollow-in-the-Marsh, the girls slip out to see the famous Shadow Man, an enigmatic puppeteer. Afterwards, oldest sister Grace is missing. Can Willa save her sister from one fate, and yet outrun her own?