Nina, an orphan living outside the Kingdom of Fortuna, has eyes the same color as the god of the morning star. Because she has the same eyes as Princess Alisa of the Kingdom of Fortuna who died in an accident, Nina was found by the second prince Azir and asked to be a substitute for the princess. As a substitute for the morning star priestess and the princess, Nina was given the mission of marrying the first prince of the great country Galgada, Set, as a fake bride in three months. Even though she was played by fate, Nina was happy that she was needed. When they made up their minds to protect their loved ones, the fate of the three began to change dramatically!