Samuel Tong (Francis Ng) resided in the UK to spend a long vacation following his wife's death. After encountering Holiday Ho (Fala Chen), a wanderer whose boyfriend died in an aviation accident, he ends his vacation early after finally making the cake that he made for his deceased wife, Zoe, he returns to Hong Kong, and joins Skylette Airlines as a pilot to fly again. He meets Captain Jayden "Captain Cool" Koo (Julian Cheung), and the two exhibit two distinct personalities, with Sam being reserved and Jayden being a man who likes to attract attention.  Respectively, the two get emotionally entangled with Holiday, who arrives in Hong Kong to apply for pilot training (PPP — Pre-pilot Project). Moreover, Sam becomes a training captain to assess Jayden, leading to a competition between the two for both career and love.  Jayden's younger sister Summer Koo (Myolie Wu) is an aircraft maintenance technician, and she bears grudges against her brother due to an unhappy experience during her childhood. Samuel's younger brother Issac (Ron Ng), due to Summer physically resembling his sister-in-law Zoe, is unable to turn a blind eye on it and helps settle the dispute between Summer and her brother. Summer has a crush on Issac, yet Issac restrains himself from taking another step forward in order to avoid evoking Sam's grief.  In the end, the misunderstanding causes Summer to think that she was only treated like Zoe (Sam's deceased wife) in Issac's eyes. First Officer Roy Ko (Kenneth Ma) has two girlfriends and cannot make up his mind as he does not bear to hurt anyone. After sharing his secret with Heather Fong (Elena Kong), a senior purser, Roy and she become close associates, and the two even have a one-night stand.  Jim Jim (Him Law), who used to represent Hong Kong in swimming, plans to retire and enrol in flight training, where he falls in love with CoCo Ling (Nancy Wu), who is to be a surrogate mother for her friend.  With the planes taking-off and landing, stories of sorrow, parting, joyfulness and re-encounters have been constituted.