Rosa Dew, a young girl with no memory (but great fashion sense), finds herself alone in a rundown seaside town that might just hold the key to her identity. But who in Walmington can help Rosa on her quest to uncover her past: the sinister Earl of Dorincourt, with his army of pirates and witches, or Professor S., the elderly curator of the Cabinet of Curiosities, a museum filled with a vast array of strangely familiar magical items?