Lee Min-Cheol returns from the U.S. to join his father’s booming label, Victory Records, only to uncover a legacy of corruption and a buried truth. Meanwhile, Kim Yeon-Soo and Kim Se-Na, two orphaned girls who grew up like sisters, arrive in Seoul chasing new dreams. Inspired by a childhood encounter, Se-Na longs to become a singer. Yeon-Soo takes a part-time job at Victory Records to fund her education. Unknowingly stepping into the fractured world of Min-Cheol and Sun-Jae. Yeon-Soo strikes a deal with Min-Cheol: she will tutor his rebellious sister if he supports Se-Na’s music career. As they grow closer, love blossoms between them. Meanwhile, Sun-Jae quietly falls for Yeon-Soo but hides both his feelings and his passion for music. When the sins of the Lee family surface, tragedy follows. Victory Records collapses, Sun-Jae’s mother commits suicide, and Min-Cheol loses everything. Grieving and guilt-ridden, he tries to distance himself from Yeon-Soo for Sun-Jae’s sake, unaware she is gravely ill, a truth only Sun-Jae knows. When Min-Cheol learns the truth, he chooses to stay, standing by Yeon-Soo’s side in the face of everything they have lost.