Nidia, a red-haired beauty who seems to be petite and sweet, but in reality, she is a very powerful warrior. As the descendant of the legendary red dragon king and the siren queen, she ran away from home because of an accident and wandered around the Faeruin continent doing missions to earn a living. During one mission, Nidia was assassinated by a Drow, a dark elf with silver hair and red eyes, Ysilnod, who is as much evil as his handsomeness. The Drow live in the dark underground, each one is a skilled assassin, and the male Drow grow up in brutal training and sexual abuse. However, for underestimating Nidia\'s power, Ysilnod failed in his mission, after being punished to death and abandoned, he fled with his last breath, yet was found by Nidia. Since then the dark elf became the slave of the dragon princess, and the first demand of his mistress is \'show all your skills to please me...in bed\' What kind of punishment will the slave face? What will be the future of these two people who each carry secrets?