Mystery of the Ghost (The Adventures of John Blake)

Far out at sea, and hidden by the fog of time, sails the Mary Alice and her crew - searching for a way home. But the mysterious ship is being hunted by a villain who will go to any lengths to track her down . . .

When a storm hits a small family yacht throwing a young girl overboard, John Blake dives in to save her and brings her aboard the so-called ghost ship. But trying to return her to her own time means going back to the one place where they run the greatest risk of being completely annihilated.