There are things that simply shouldn't be there at the same time. An example of this would be blood, night and sacrifice. When 4 children realize that they are part of a sacrifice, they fight for their freedom. Little did they know what importance they carry and again what kind of foe they will fight. Be it against humans, vampires or other beings, they will have to try, because their defeat means the defeat of the whole world. Fortunately, they meet a person who helps them, but this person is also haunted by shadows from the past. However, the most important task of the children would be to find out who they are!