Seven years ago, Shen Ruo sat alone until dawn at the signing site of his mother's surgery. No one answered the call he made to pilot student Lu Zhi. She proposed breaking up and just said "we are not suitable".
Seven years later, Shen Ruo was transferred from ground service to flight attendant, and worked his best to become a flight attendant. Lu Zhi is already the airline's youngest flight instructor. He is strict and cold, and never shows mercy to anyone.
Destiny wanted them to meet again - Lu Zhi became Shen Ruo's training and assessment instructor.
He always made things difficult in class, and she argued with him. During the flight, he was calm and professional, and she was meticulous and thoughtful. Two scarred adults were forced to re-examine their first love that ended in vain at an altitude of 10,000 meters.
The truth of that year is revealed layer by layer: the 50,000 yuan in surgery fees, the intercepted visits, the concealment of the mother before her death...
Shen Ruo said: "When I needed you most, you were not here."
Lu Zhi said: "Then I will spend the rest of my life to compensate you."
When competition in the workplace, security crises, and the return of ex-girlfriends come one after another, can they find the smoothest route for each other above the clouds this time?