The story follows twins Grace and Connor whose father dies, leaving them in debt. They try to run away on their father's ship but it wrecks in a storm, separating the twins. Connor is rescued by pirates who take him in while Grace is rescued by vampirates. The twins live very different lives on the different ships as Connor learns from the pirates and Grace lives in silence with the vampires. In the end, they have still not been reunited and continue searching the seas for one another.