The feared pirate Captain Flint fights for the survival of New Providence Island after the pirates in West Indies are declared as enemies of mankind.

In the wake of the burning of Charles Town, all the New World lives in fear of Captain Flint. But when his campaign of terror crosses over into madness, and new threats emerge to challenge his supremacy, it falls to John Silver to locate the man within the monster, before Flint’s war against the world consumes them all.

With the Walrus crew stranded and the precious Urca gold in Spanish hands, Flint and Silver join forces. Meanwhile, Eleanor's grip on Nassau is slipping when a new breed of pirate arrives in the form of Ned Low. As blood is spilled and tensions mount, Charles Vane must decide which he values more: Eleanor's life or his men's respect

Black Sails is a gritty, 18th-century pirate drama acting as a prequel to Treasure Island, following the feared Captain Flint as he fights for the survival of New Providence Island. Flint, along with allies like Eleanor Guthrie and a young John Silver, seeks a legendary treasure galleon to secure their future against encroaching British and Spanish forces.