Aegis, a genius sound engineer battling severe social phobia, suddenly soul-swaps into Lyra, the most beautiful K-Pop Idol in Korea. Trapped in the global spotlight, he must desperately hide his male identity and fight a crippling chart manipulation conspiracy threatening to ruin Lyra's agency. The stakes escalate when Ella, his soulmate, begins sensing his male soul, and a second transmigrator arrives, bringing a terrifying threat: a Dimensional Rift. The stage is his battlefield. Can Aegis use his unique grasp of frequency and sound to save his career, his love, and reality itself—all while trapped in a body that isn't his?