In 'Slaughter Alchemy God,' the demon god Qin Yang, who has reached the level of a half-step sovereign, loses his beloved wife and, taking a great risk, uses the Wheel of Rebirth to return to his youth. His beautiful senior sister becomes his guard, a wealthy and noble young lady becomes his maid, and a powerful alchemy sect's alchemist pleads to become his servant. Pure holy maidens, charming demonesses, imperial princesses, and elven queens, all of whom are stunning beauties, vie for Qin Yang's attention. However, Qin Yang's heart remains solely with the wife he has chosen.