Lewis Dearborn is a lonely, anxious, "terminally shy" boy of eleven when his great-grandfather passes away and leaves Lewis's family with his decaying seaside mansion. Lewis is initially delighted with his new bedroom, a secluded tower in a remote part of the house. Then he discovers that it's already occupied -- by the ghosts of seven dead pirates. Worse, the ghosts expect him to help them re-take their ship, now restored and on display in a local museum, so they can make th