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An overeducated, disenchanted woman, Ja Young, loses her ambition after many grueling years of studying for the public official exam. Which she has failed multiple times. One lonely evening, a beautiful, fit runner, Hyun Joo, glides smoothly past her. Intrigued by this celestial vision of harmony and grace, Ja Young repeatedly returns, hoping to meet the object of her curiosity. Ja-Young begins to jog. The pressure she has felt from other people begin to dissipate and vitality returns to her life. Ja-Young also picks up a part-time job. Hyun-Joo's life is not perfect.

In a worldwide drug-poisoning case, a treasure-seeker named Chi Lu will be disguised as a visiting scholar to Hai Yan due to an entrust. This has broke the calm and peaceful life of a girl named Dai Xi. As the missions go on, their feelings will both gradually warm up. However, the disappearance of the Professor Dai, the exposure of Chi Lu’s real identity and the true recipe of the secret drug will also be revealed in the midst of that. Dai Xi are full of doubts and suspicions and she can no longer ignore the strange changes in her body...

The cast members are split into two teams, the boys team and the girls team, and each team manages and runs a restaurant. Throughout the show, they also complete missions that are related to managing and running a restaurant.

Jung Woo, an NTS (National Anti-Terror Service) agent, is assigned on a mission in Italy while he was getting involved with Hae-in who works at the NIS (National Intelligence Service) but in the public relations department. The South Korean president's daughter is kidnapped by terrorists when Korea develops a new nuclear technology that will shake the world energy market. In a situation where it can become a national emergency, US shows its support by dispatching their head of East-Asia at DIS(Department of Information for Security) named Son Hyuk. But most surprisingly, Jung-woo finds a "black agent" joining them, a top secret organization within NIS that only takes on impossible missions, and that it is no one other than Hae-in. And there, the three make their fateful encounter. With Hae-in's remarkable help, NTS rescues the president's daughter and having revealed her identity, she is assigned as Jung-woo's partner while Son Hyuk is ordered by the U.S. government to supervise any further developments of South Korea. As South Korea gets closer to completing the new nuclear reactor, numerous terrors begin against them. Jung-woo discovers that there is a secret society called Athena that has great power over the world energy resources and that they are the ones behind them. But as he gets closer to finding out the truth, mysterious events unravel and he finds evidences that indicate that both Hae-in and Son Hyuk are involved with Athena.