What is the feeling like to be locked somewhere and you can't find the exit out? It would surely be frustrating to see that happening, because your freedom is going to be diminished, pushed away, you would be frustrated and all of that. That way we could see and understand how important freedom of movement and living is. And we all fight for that ideal.
Of course that it is ideal, and it is the subject that people want to talk about, they fantasy about it, but no one actually can say what that is because what freedom is for one person doesn't have to be the case for another one.
Creatures that are not human, the frog woman, the man the non-human and the bird woman are trapped into the castle of the old bad vampire Ethan. He actually hates the non-human creatures because they have the powers that can help them win him over, but the power of these creatures actually becomes smaller if they stay locked in his castle and they don't have the entrance to their dwelling houses. The non-human creatures will have to find all the keys from the iron doors of the castle and to run away from there.