There are two worlds held by a portal that was always open. A world of Vampires and Werewolves. Both kinds get along well and fine and some are even friends. For Vampires there are the Ventrues who are the rich and classy the Avions who are the more wild and not caring and the Avians who are the weakest but are more kind. Then there's the very rare kind of Vamps Royal Vamps they can use any ability they want that the other three kinds have. They are usually more sadistic and none caring then the others. Avians along with Humans are either pets, servants, or just always tracked so they don't do anything wrong. For werewolves there are Alphas the leaders the rarer the mark the more powerful, the betas, the second powerful under Alphas, the Omages the weakest and are usually are used as pets or servants like humans and there are the Ultimas the ones stronger then the Alphas the blood ultima which always has red and black fur as a wolf the second strongest Ultma, the Royal Ultima who always has a gold and white fur in wolf form and the regular Ultma who has normal colored fur. What's very rare is a blood or royal ultma having a child with a Royal Vampire especially one with the very very rare blood red and black heart royal mark. That child is said to be the most powerful and have all the powers of all the different vampires and werewolves. (You can be any kind even the rare hybrid) There was also the Avengers world. The avengers had just found about the portal but have no real idea how it is.