Whilst facing threats on all sides, including a possible mutiny, Captain Flint hires a young sailor named John Silver, who hides his most precious possession. As the Royal Navy gets ever more powerful, Eleanor keeps order on New Providence.
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.
The Walrus crew is stranded, with an army of Spanish soldiers standing between them and the precious Urca gold. With their crimes against their brethren no longer a secret, Flint and Silver must join forces in a desperate bid for survival.
Flint returns to Nassau and encounters a dilemma. Eleanor turns to an unlikely source for help. Rackham works to restore his reputation. Vane gets an unexpected prize.
Miranda endeavors to save the island. Eleanor sees old wounds reopened. Rackham is on the scent of a secret. Vane is forced to take matters into his own hands.
Max surveys the aftermath of a massacre. News from the outside world impacts Flint and Silver. Eleanor takes a risk that she hopes secures her future. Bonny comes to a crossroads. Dufresne provokes Billy to act.
Flint and Miranda come to grips with their past. Bonny makes clear her intentions to Rackham. Vane collects a huge prize. Eleanor issues a declaration of war.