Through the hour-by-hour account of this tragic voyage, we will decipher the fate of this submersible, strangely similar to that of the Titanic ocean liner. We will go back a few months to revisit the design of the craft that its creator, Stockton Rush, intended to be revolutionary. Thanks to the testimonies of experts, relatives of the victims, and former passengers, we will attempt to understand what really happened aboard the Titan and how this underwater adventure turned into tragedy.