Yin was an orphan found and raised by locals of Floral Falls. In an unfortunate incident, he ran into the fleeting Evil God, Lieh and have since become the latter's a vessel. Although he'd managed to regain control of his body, there was always the risk of the Evil God would break loose and wreak havoc up on everything he came into contact with. To protect his loved ones and hometown he embarked on the journey to Moniyan Empire alone in seeking a cure.