Hong Du-ke, who lived on a remote island to escape the Japanese invasions of Korea. On the anniversary of his father's death, he went into the sea to find a sea anemone and was reincarnated in this world, Joseon...! However, in the other world of Joseon, there was a curse that dried up the male seed, and the reincarnated Hong Du-ke followed Princess So-myeong and was tested to overcome this difficulty. Will Hongduke be able to lift the curse of Joseon and become king