To the quiet shores of a little-known seaside realm called Plunder Bay, two twins have been delivered. Out of the mists of time and space, from the roundhouse of a ghost ship, this precious cargo has been entrusted to Miranda and Penelope McBee in their magical lighthouse cottage.

As they grow-up, Cassandra and Peter McBee begin to master the powers shared by many of the residents of Plunder Bay. With their friends, they attend Miss Tweaks' class at the enchanted school that used to be the site of the historic trading post-a place that dealt in stolen pirate treasure and loot from the work of wreckers.

When the twins bring their own magical treasures home after visiting the annual Smuggler's Bazaar, dangerous people and strange events begin to manifest in their quiet fishing village. It isn't long before Cassie and Peter are in mortal peril, along with anyone who tries to protect them.

Can the twins unravel the mystery behind the evil forces that have invaded the school, a dark magic hourglass that counts down to someone's death, a mystical sea monster, and a sorceress who will stop at nothing to gain control? Can they trust the people who say they want to help? These are just some of the challenges confronting the young heroes and their friends in this riveting adventure.

Join the McBee twins on a journey of magic, piracy, and ancient sea-lore as they uncover the forces at work all around them. Travel back through time and along the shores of the North Atlantic with buccaneers and wizards to uncover the mysteries of this realm and to discover the true treasures of Plunder Bay!