"This time, I'll protect my son's life and my happiness...!" The king is killed in a coup, and as his daughter, Lusha grows up locked away in a cell. One day, she is suddenly taken from her cell to be married off to Emperor Ricardo, known as the Cold Blooded Emperor for his terrifying looks and personality, in her cousin Marguerite's place. Lusha soon finds out that it is a marriage in name only and her only duty is to bear an heir. However, when she gives birth to her son, she feels happiness for the first time. Meanwhile, hoping to use Lusha's position and son to her advantage, Marguerite sends an assassin to kill Lusha. Right when Lusha is murdered, she miraculously goes back in time to when she lived in a cell. Determined to avoid being killed herself and saving her son, Lusha marries Ricardo once again. This time around, she notices a surprising side of Ricardo she never knew before... The stand-in princess who was forced into a marriage with the Cold Blooded Emperor and murdered leaps back in time and turns her life around completely!

(Source: MangaPlaza)