Divers,wreckinvestigators,andarchaeologists,tellthestoriesofthefinalmomentsofshipsandthoseonboard.Examiningtheevidenceinthewreckage,withstateoftheartCGIandthelatestunderwatertechnology,andcombiningitwithpowerfulpersonaltestimony,bringsoutthehumansideofthesetragedies,aswellasansweringthequestionsofwhathappenedandwhy.