More than 1,100 sailors and Marines died aboard the USS Arizona when Japanese bombers struck Pearl Harbor on December 7, 1941, and the wreck still lies where it sank, now a underwater war grave and memorial site. This film follows divers and historians as they examine the hull itself, using footage and access to the submerged battleship to piece together what happened deck by deck during the attack. Interviews with historians and preservation experts explain how saltwater, oil, and time are slowly breaking the ship down, and what the National Park Service is doing to document it before it deteriorates further. Archival photographs and film from 1941 are set against present-day footage of the memorial that now spans the wreck, where oil still seeps to the surface decades later. The film treats the Arizona as both an engineering puzzle and a burial site, tracing the attack's sequence of events through the physical evidence still visible on the seabed while acknowledging the men entombed inside.