Entwined by Heather Dixon

After their mother dies at childbirth, Azalea and her eleven sisters are forced to go into a year-long mourning, where they aren't allowed to dance, something they love doing together. In the midst of their mourning, Azalea finds a secret pathway to an underground place that is guarded by a man that calls himself The Keeper. He tells the girls of a frightening story of how he is trapped and dreams of being free. But as time passes, they begin to realize that things are not what they appear. Based on the fairy-tale The Twelve Dancing Princess.