Luna Blue knew that the time had come for her to go down to Earth and help humans remember that magic did exist. However, she didn't know that she would also need to save her sisters and her moon mother as well. With her enemies, the sons of Sol hunting her, she would have no time to waste. With the help of human 'rememberers,' she would need to step into her power as a daughter of the moon before it was too late. Could she complete the tasks required of her? Could she save them all? She wasn't sure. But she believed that once in a blue moon, anything was possible.