Clara and Angelica Grace have never met ghosts. They've never sailed on a tall ship, ridden wild unicorns, or fought with magical weapons. Instead, the teenage twins have a wretched existence, ignored by their troubled parents in a rundown home and tormented by the town's snobs. Everything turns topsy-turvy all of a sudden when discovery of an ancestor's hidden journal with an odd key to an unknown door leads them into an entirely different realm. The girls go on a thrilling oceanic voyage to search for mysterious whales, train with a seasoned warrior, and are befriended by a wise Master. But all is not a bouquet of lovely lilies... they are hunted by a cunning warlock and must rid themselves of The Warlock's Curse.