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 is 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 is given the mission of marrying the first prince of the great country Galgada, Set, as a fake bride in three months. Even though she is played by fate, Nina is happy that she is needed. When they make up their minds to protect their loved ones, the fate of the three people begins to change dramatically!