The story of Ruan Xingmian and Shi Yan begins with the starlight falling in the courtyard of the old house. As childhood sweethearts from fairly well-off families, their youth was like sweet oranges wrapped in sugar - Shi Yan was the little sun with a warm smile, always surrounded by a group of friends, but left the most patient companionship to Ruan Xingmian; while Ruan Xingmian was a lonely star, accustomed to shrinking into her own small world, and Shi Yan was the only exception in her sixteen years of life who was willing to let go of her guard and open her heart.
At that time, they never thought that fate would suddenly cause a storm in the summer after the college entrance examination. Shi Yan's family was maliciously plotted by a villain, and half of his father's hard work was wiped out overnight. He fell from the clouds into the mud. For the first time, he, who had always been calm, tasted the heaviness of life. And Ruan Xingmian, this seemingly weak girl, hides a secret that has taken root in her heart since she was twelve years old - her brother, a special forces soldier, died during an undercover anti-drug mission at the border. The bloody military badge became the most painful mark on her when she was young, and it also made her secretly determined to join the army, and her goal was to be a special forces force with a narrow escape.
She knew the dangers of this road, and she knew even more that Shi Yan's gentleness would tie her down. If he were to know where he was going, given his temperament, he would be worried and sleepless day and night. So when Shi Yan needed support the most, Ruan Xingmian chose to leave without saying goodbye, leaving only an empty room and a gap in Shi Yan's heart that could never be filled.