Han Do-Kyung (Choi Ji-Woo)　and Kim Ji-Sung (Lee Jung-Jae) are on a plane to Korea. On the plane, there is an emergency patient.

Han Do-Kyung comes to Incheon Airport as a director.

She is asked to cooperate searching for murderer by Kim Ji-Sung, a National Intelligence Service agent.

The patient is in the airport hospital. He gains conscious and runs away.

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Kim Ji-Sung chases the patient. He captures the patient. He considers him to be the murderer.

Han Do-Kyung says to Kim Ji-Sung,"There is no evidence he is murderer." Kim Ji-Sung is said by his boss,"Give up him."

Han Do-Kyung goes to Yi-Kyung's house. Yi-Kyung is Do-Kyung's younger sister.

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The patient is killed.

Kim Ji-Sung is assigned to Incheon Airport.Ji-Sung asks Do-Kyung to rise security threat level in order not to make the criminal go out of Korea. Do-Kyung refuses it. But her boss decides to rise security threat level.

Ji-Sung shows Do-Kyung a pendant of Triad members who are the murderers.

Ji-Sung finds out the suspect is in Pusan by telephone records. He goes to Pussan.

Do-Kyung sees a man with the pendant at Incheon Airport. He's the suspect.

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Ji-Sung returns to the airport by helicopter.

The suspect,Charlie Wei, runs away keeping Do-Kyung hostage. He goes to a parking area with Do-Kyung. He's captured by SWAT.

Ji-Sung is wounded seriously. Suh Myung-Woo takes care of Ji-Sung. She is Ji-Sung's ex-girlfriend, a doctor in Incheon Airport.

Do-Kyung calls Yi-Kyung. Yi-Kyung is a pilot.

A woman collapses with blood at the bathroom in the airport.

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The woman entered to Korea illegally.She came from North Korea in order to meet a man,Kim Heryeon.

Ji-Sung orders his subject to look for the man. The woman meets the man. She returns to North Korea.

A lot of birds hit a plane. Do-Kyung is asked to kill birds by pilots. The runway is closed because of birds.

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Runways must be opened in 2 days because guests from North Korea come to Korea.

Do-Kyung draws a picture of a bird as big as the plane. Birds fly away. They can open the runways.

A drug patient, Jang Han-Chul,collapses at the airport.

Do-Kyung meets a friend in college in Shingapore. He is Kim Jung-Min. Jung-Min leaves a parcel with Do-Kyung. There are drugs in the parcel.

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Do-Kyung is arrested.

Ha-Joon,Do-Kyung's colleague, goes to Hong-Kong pursuing Kim Jung-Min.

When Ji-Sung sees Do-Kyung treated by a prosecutor badly, he is angry and hit the prosecutor. He is suspended.

Nevertheless,Ji-Sung goes to Hong-Kong.When Ha-Joon catches Jung-Min, he is attacked by a lot of people.

Do-Kyung is released.

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Do-Kyung knows Ha-Joon is in Hong-Kong. She also goes to Hong-Kong.

Ha-Joon succeeds to contact with Yang, a drug seller.

Do-Kyung meets Jung-Min.

Ji-Sung captures the drug group. He is wounded seriously.

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Do-Kyung,Ji-Sung and Ha-Joon return to Korea.

Yi-Kyung moves to Do-Kyung's house.

Ji-Sung is in Jangsung Island. Myung-Woo goes to the island.

Do-Kyung,Ha-Joon and colleagues also go to the island as a company trip.Do-Kyung misses the last ferry. She does a night fishing with Ji-Sung. She kisses his lips.

Ji-Jung is called by his superior to the airport.

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Planes can't start because baggage handling system is out of order. Terminal 2 opens. It works.

The reason why baggage handling system is out of order was hacker.

Serge Evanovich who is considered to be involved in making counterfeit money reaches at the airport.

A man tells the airport by phone, "I'll bomb the airport." It is prank.

Serge is killed when 8 agents see him.

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Do-Kyung and Ji-Sung investigate a route to get new notes from Hong-kong bank to the airport.

Ji-Sung sees a place in the airport, where criminals work for stealing money. Ji-Sung doesn't notice anything.

Do-Kyung takes Ji-Sung to her house.

The suspects who killed Serge are found out. They are specialists of bombs.They are ones Ji-Sung saw in the airport

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A hideout of the suspects is found out. Ji-Sung attacks it ,but nobody is there.

Criminals steal a cash transport truck. Just then, in the airport there is a commotion of a bomb.

New bills into the vault in the airport are found out to be counterfeit.Do-Kyung and Ji-Sung investigate a crate of artwork from Russia in a baggage storage facility. Bills come out from there.

Three criminals are captured.

Myung-Woo collapses.

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Do-Kyung meets Michael Jang and has a dinner in order to increase air route to South America. Michael Jang works for Neo Airlines.

Myung-Woo is cancer and difficult to take an operation. She takes chemotherapy.

Kim Sun-Woo keeps a security man hostage. Sun-Woo is a son of a woman Ji-Jung's superior loved in old days.

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Sun-Woo comes to Ji-Sung's house.

Sun-Woo is on a hit list in Los Angeles. He moves to a safety place.

Do-Kyung does a presentation to Michael Jang. She is turned down.

Jihao Wang in Sun investment Corp plays golf with Michael.

Sun-Woo disappears.

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Ji-Sung captures Sun-Woo.

There is a rumor that Neo Airlines and 7 star Airlines will be merged. It's not true.

Do-Kyung and Ji-Sung investigate what Michael conspires.

Sun-Woo returns to America in order to live with his mother.

Do-Kyung does a presentation to the CEO of Neo Airlines. Michael is fired by the CEO. Do-Kyung's presentation is successful.

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Ji-Sung is ordered to go to Moscow. He says to his superior,"I don't want to go to Moscow."

Do-Kyung and Ji-Sung go to a church. Ji-Sung proposes to Do-Kyung. Do-Kyung can't tell Ji-Sung that Myung-Woo is cancer.

Ji-Sung knows Myung-Woo is cancer at hospital. Do-Kyung knows Ji-Sung noticed Myung-Woo's disease.

Ji-Sung tries to go to Moscow without telling Do-Kyung anything. Do-Kyung meets Ji-Sung before he leaves Korea.

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