In the midsummer classroom of my boyhood, cicadas were chirping noisily, and the sun was shining all over the desks. Lin Yu, an ordinary young man, secretly fell in love with Su Qingyuan, the top student in grade at the best age. Her eyebrows were gentle, clean and transparent, and she had an unnoticeable fondness for him who was clumsy and shy. But inferiority was like a chasm that could not be crossed. Looking at her dazzlingly shining face, he always felt that he was ordinary and insignificant, not worthy of her glory. He hid his love deep in his heart, not daring to confess, not daring to get close, only daring to stare from afar, letting his youth come to an end with regret. After graduating from high school, the crowd dispersed and we never met again. Years go by, and years pass by in a hurry. Lin Yu kept his original intention deep in his heart and never fell in love. He worked hard alone and became a well-known and stable lawyer in the industry. But Su Qingyuan lived up to his youthful ideals, studied hard in a cold window, put on a white coat as he wished, and became an emergency doctor who saves lives and heals the wounded. Destiny is the most absurd. When we meet again, things have changed and the trajectory of life has long been settled. An accidental encounter on the street corner, the two met again after many years. The thoughts of the young boy from the past surged instantly, and the love that had never been let go was revived at the moment of reunion. He didn't dare to disturb her stable life, so he could only choose to stand in the dark and be the silent guardian behind her. When she encounters a doctor-patient dispute, he quietly steps in to help her; when she gets off work late at night and has a dangerous journey, he quietly drives away to escort her...