11 dancing princesses

My idea is the king have 11 princesses and one son . They are all vampire who suck the emotion of humans. Each one have their emotion they like to eat.Living in the modern world is hard since there more people and their father don’t like it when they go out because he scare human will hurt them. They put the humans in jail if they can’t find the truth. This girl name Sarah went to find the serect of the princesses because her brother was there before he disappeared .  The Prince fall for her and help her find the serect of the princess but if she fall for him he have to suck up her love since he have to feed .