Centuries ago, a planet has been destroyed by evil creature which forced it's survivors to ran away to the earth and live among us. With a task to find the princess, the 12 knights hide their true identity as a famous boy band in Korea and China. Not just find her, but also remind her who she really is and to protect her from the enemies. Even after all those years, the enemies still keep eyes on them and targeting them. Will they succeed to find their princess and broke the curse to fight back this time?