Description What was supposed to be a relaxing ocean crossing for Billy Stuart and his friends after their adventures on the island of Crete quickly transforms into a veritable odyssey. A violent storm throws them off their maritime course and leads to a downpour of events with potentially tragic consequences: mutiny, vicious monster attacks, siren songs and more. The dire situation doesn't get any better when they finally make it to shore. A thousand dangers make the Zintrepids' every waking moment seem like a nightmare. And is Billy Stuart still on the trail of his grandfather, the explorer Virgil Stuart who has traveled through time? Or are the Zintrepids forever lost in an unknown age and strange place?