In the wake of Charles Town, the world lives in fear of Captain Flint. But when his campaign of terror crosses over into madness, it falls to John Silver to locate the man within the monster. Meanwhile, with Eleanor Guthrie gone, Jack Rackham and Captain Charles Vane struggle to secure Nassau for the ages. All will be tested when a new threat arrives. It knows them. It understand them. And in the blink of an eye, it will turn them against each other.
The Walrus crew engages with the elements; Teach disagrees with Rackham; Rogers and Eleanor determine terms for their partnership; and Bonny worries about her future with Max.
Silver gets pushed to his limit by Flint. Nassau readies itself to fight back against an invasion. Rackham steps up and takes control while Max gets her house in order. Vane must make a difficult choice if he hopes to avoid defeat.
Civilization returns to Nassau, and sets its sights on Vane. Flint, Silver and Billy encounter a new enemy. Rackham takes a stand against his crew. Scott finds a place in the new regime.
Facing certain death, Silver pushes Flint to take action. Teach shows Vane a way forward. A new threat puts Eleanor and Rogers on notice. Max makes her play.
Flint and Teach clash over the future of piracy; Rogers makes an arrest; Rackham finds new purpose. Madi comes to Silver's aid.
Captain Flint and Silver returns to Nassau to finish what they started and a legend is born. With Rackham's fate in the hands of Rogers, his future looks grim. Vane's mission evolves while Eleanor confides in Rogers.
Rogers comes under attack while moving a prisoner. Violence erupts on the Walrus. Silver and Madi are put to a test. Billy sees a new role for himself in the coming battle.
Eleanor risks everything to save Rogers; Billy looks for allies; Vane faces judgment; Flint and Silver ready for war.
Rogers and his forces come for the pirates. Rackham and Bonny face impossible odds. Silver demands answers from Flint. Billy crowns a king.