When the Nautilus is spotted by Company soldiers in the Gulf of Kutch, it must make the open sea. Just as they are almost away, the Dreadnought appears. Nemo must give the crew a reason to stay, more than being punished if they flee and are caught. If they secure the Halvar treasure, they can buy influence, power and anonymity. They work together and evade capture, but there’s a dangerous stowaway onboard, and on the dark sea floor, something lurks… (thetvdb.com)