James Cameron, who has made more than 30 dives to explore the Titanic, brings together a team of engineers, naval architects, artists, and historians to solve the lingering mysteries of why and how an “unsinkable” ship sank. With their combined expertise, they examine the feature film and determine what technology has revealed since its release. An investigation of this magnitude has never been attempted before, and some of the revelations alter the fundamental interpretation of what exactly happened to the Titanic on April 14, 1912.