Captured in Atlantis

The boys are off on another adventure. They face storms in Ben's world and the greatest threat in Seth's world. They have become bound together in an unexpected way, where their deepest, most private thoughts are open to each other. The one place they can get help is in Atlantis. To Ben it is a mythical city, but to Seth it is the last safe refuge of mankind. Now, it has been captured by Koom.