Astaroth, the demon of death and war, fell blindly in love with a human man and paid for it with her life. Betrayed and murdered by her lover Enrique, who used her to seize the throne, she is given a second chance by her demon sisters and awakens in the body of Leonarda, Enrique's empress. To reclaim her powers, she must fulfill one cruel condition: drive a dagger through the heart of the one she loves. Falling in love was her ruin, but this time it will be her deadliest weapon.