The series revolves around the siblings Jiang Mu, the sheltered and pampered younger sister, and Jin Zhao, the extremely gifted older brother. When Mu is nine years old, their parents get a divorce and her father and Zhao move to Thailand. As such, Mu and Zhao's lives become two paths that never cross. After learning that her brother is adopted, Mu flies to Thailand alone. When they meet again, the once elegant boy has transformed into a rugged young man hardened by the streets. Zhao is now into boxing and racing, living a life full of wild thrills and danger that is completely unfamiliar to Mu. Undaunted, Mu works to assimilate into the life of Zhao and her father's family. Aligning with her talents, her studies and life in Thailand are just as splendid, and her enthusiasm and empathy brightens Zhao's life. As Zhao's co-pilot, she is his perfect navigator. Seeing that Zhao is stuck in a quagmire, she decides to pull him out and take him home. When an accident separates the two again, Mu takes on the responsibility of taking care of the family while fulfilling their shared ambition and aerospace dream. Many years later, Mu returns to China after graduation. Mu and Zhao reunite again in Nanjing, expressing their affection to each other in their own ways. From then on, like the glorious sun in the day and the bright moon in the night, their love shine and glow for an eternity, never to be separated again