A bloody war is raging across the oceans, with the Pirate Federation and Nocturnals in alliance against the renegade Vampirates, led by Sidorio and Lola. Lola might be heavily pregnant with twins, but it doesn't stop her from remaining an active in battle! Connor and Grace Tempest each have important roles to play - he as a pirate warrior at the heart of the fight; she as a powerful healer working with the war-wounded. As the twins face their greatest challenges to date, old allies and foes return to play their part in the ultimate battle of Pirate versus Vampirate.