Meet Kate Wilson, systems engineer. Kate is a reluctant hero who finds herself caught behind enemy lines when terrorists seize the Queen of the World, a new city-sized super ship. Hydrophobia is set onboard the Queen of the World; which is the largest ship ever built. It is comprised of two massive hulls each several times longer than the biggest contemporary cruise ships. The area between the hulls resembles a city - it has schools, universities, even a football stadium. The ship is in truth the reclusive preserve of the super rich. Here the most modest condo starts at $250m and the most expensive in the billions. It is a mini state. A state with no taxes (the ship never ventures into territorial waters) and no legislative controls. As such it has attracted businesses that want to keep their activities away from prying eyes.