The book begins with the wrecking of the ships SS Andrea Doria and MS Stockholm and moves to modern times with gun fights and chases from Boston and Washington DC to Africa and Mexico. The introduction of replacements for Dirk Pitt and his sidekick does not change Cussler's plot.In 1956, off the coast of Nantucket Island, a crew member of the Stockholm causes the collision with the Andrea Doria then disappears. After the collision, a waiter aboard the Andrea Doria witnesses the murder of several men beside an armored vehicle in the hold of the ship.