Matthew Ko Hor-fung is part of the Government Flying Service second commander of air crew. He has a girlfriend Carrie Hong Yau-nam who has been in a coma for three years from a car accident. She finally awakes from her coma, and recovers her memory speedily with Matthew's attentive help. Matthew is a commander air-crew who always do on-air rescue via a let down rope attached to the GFS helicopters.
Carrie Hong Yau-nam, Matthew's girlfriend who is in coma for 3 years and finally wakes up after Matthew's continuous and touching efforts. However, Carrie couldn't accept all the changes in the 3 years of her coma and was obviously rejecting Matthew. But after tons of struggling and thoughts over it, she realises that Matthew's strengths and decide that she should start afresh and gives him a chance. Carrie, before her coma was a doctor in the A&E department of a hospital, however by a twist of luck, she joined GFS as an Air-crew doctor on board the helicopter alongside Matthew. Matthew's friend, Benjamin Yip Ching-wan, who is the first commander pilot of the GFS becomes good friends with Carrie and they start a new relationship.
Nikki Chow Siu-kuen is a GFS tower communicator that controls the ATC commands of GFS helicopters. She uses a wheelchair. She strives to be positive towards life. She is always seen to bicker with Kelvin but always secretly giving him valuable advice. Was once in love with Benjamin, but realised that Ben has no feelings for her, before she decided to cease her "idolizing love" towards him.
Sandra Si Choi-kei is a newly recruited air crew who is under the mentor of Matthew. They had their differences at first but eventually began a relationship after Matthew and Carrie broke up.
Kelvin Chiang Ka-nok is a nervous and yet timid pilot. He is scared on his real time practice conducted by his mentor, Benjamin. However, with much patience and guidance, Kelvin is able to slowly overcome it eventually. At one point of time, he is secretly in love with Sandra and have to often seek help from Nikki. But with a twist of plot, the timid Kelvin became in love with Nikki.
During a mission, Benjamin and his student Kelvin Chiang Ka-nok flew over an illegal gas station which suddenly exploded and takes the helicopter into the sea. All the crew man are saved except for Benjamin. Due to the heavy fog, the search for Benjamin is cancelled and can only be brought forward till the next day. GFS searches high and low for Benjamin and he was found at last. Eventually Matthew and Sandra are together, Derek and Matthew's sister are together, Carrie and Ben are together and Nikki and Kelvin are together.
