While Flint and Gates realise they need help to find the Urca d'Lima, John and Billy have to increase the crew's morale. Vane impresses Eleanor and Gates receives a promotion.
Captain Flint is warned about Billy. Vane encounters someone from his past. Eleanor asks her father for help. The crew of The Walrus suffer a disastrous undertaking.
Flint comes clean with Gates. Randall's actions cause problems for Silver. Eleanor suffers a loss. Max helps Rackham. Vane faces his biggest challenge.
Flint and Silver return to Nassau, and a legend is born. A change in terms puts Rackham and Bonny in jeopardy. Vane’s mission evolves. Eleanor confides in Rogers.