As it was written in catalogs, Captain Kragg was a brother of Captain Redbeard. In their childhood, they found a treasure map and couldn't decide, which one of them both would go on a voyage and find that treasure in the future. This led to a rivalry between them. Brothers then bisected a map, leaving each half of a map to each brother. Years have passed, brothers grew up, each of them became a pirate captain and went on a sea voyage to retrieve the treasure.