The Song family has twin daughters. The elder sister was born with heavenly blessings and is adored beyond measure, while the younger sister is regarded as a bringer of bad luck. Considered 'unnecessary,' she was given the name Duoduo. The disabled and fallen Prince of Pingyang originally intended to adopt the lucky star, but the Song family secretly switched the girls and sent Duoduo instead, setting the wheels of fate in motion. The timid and cowardly Duoduo and the cold, suspicious prince tentatively feel each other out through many awkward encounters. Only after Duoduo learns to read does she discover that the golden bullet comments she has always been able to see can help her escape danger! Not only does she help the prince survive a deadly assassination attempt, but she also miraculously heals his legs. Once a pitiful little girl, she turns her fate around and becomes the true lucky star, showered with fierce affection by everyone in the prince's household!