In the 21st century, during the reign of the 29th monarch of the ancient European country "New Overero", the compass of fate once again selected twelve people. They carried the twelve months on their backs. Whenever one of them passed away, he would turn into the flower of the moon and fly all over the sky to pray for the people. The prince Julan Daya Cangluoka's natural rebelliousness and longing for freedom prompted her to sneak out of the palace and leave the title of prince to her sister Xia Lu who had been hiding in the palace but no one knew about it. At this point, Julan embarks on a fantasy adventure, while Xia Lu completely falls into the abyss of pain, playing the role of sister every day... One year later, when the sun changes its trajectory and the sun shines, will the two sisters find the happiness that has been hidden deep in the darkness?