Two newborn girls arrived at the same maternity ward, one born into an aristocratic family and the other from a destitute household that lived in the city"s slums. The supervising nurse, Michiko, secretly exchanged them due to a personal vendetta, thereby reshaping their future paths. Years later, the girls' lives remain intertwined: the wealthy Miki continues to mistreat the poor Nozomi, yet both harbor identical dreams of becoming singers. Despite their contrasting upbringings, they share a bond forged by that fateful switch and an unyielding passion for music and their shared ambition keeps them connected across the years.