In July 1946, the US Navy sank a fleet of 84 decommissioned warships at Bikini Atoll using two atomic bombs, the first nuclear tests since Nagasaki and the opening act of Operation Crossroads. This film follows archaeologists diving into the lagoon to survey what remains: rusted hulls, an aircraft carrier deck, and a battleship still sitting on the seabed decades after the blasts. Interviews and underwater footage trace how the US assembled a target fleet of obsolete ships specifically to be destroyed on camera, partly to gauge the bombs' power and partly to send a message to the Soviet Union at the start of the Cold War. The team examines how the explosions tore apart the atoll's reef and left sections permanently contaminated, forcing the Bikinian islanders into a displacement that still shapes their lives, with many still dependent on imported food. The dives combine marine archaeology with Cold War history, treating the wreck site as both a physical record of the tests and a monument to the people who paid for them.