The world is threatened, and they will have to dive deep into the water to keep an ancient mystical source from opening a gate into the world of Mare Tenebrosum, a deep, black and lightless place, but Jolly wants to rescue Captain Bannon first. He is the only father she has ever known and he is in danger. She steals a ghost ship and sets off on that mission. Griffin follows, but strange other-worldly creatures, along with pirates and a host of menacing monsters get in their way and send the plot in other directions. Swords, ships, ghosts and magic combine for fast action and unexpected twists.

The plot is a bit difficult to keep track of...I wish I had read book one of the series first. I think the story would be easier to understand at the beginning.

Nevertheless, Kai Meyer is a master at creating compelling characters and a lively plot that will keep you reading and guessing. It appears that there will be a third volume in the series, and I'm anxious to read more adventures with these lively characters.