A late night restaurant opens at midnight and closes at 7am. The owner and chef of the restaurant makes whatever his customers ask for.

"When You Are In Love" is fascinating with its extremely small size, detailing the appearance of urban young men and women in different periods of love. Each episode is only about 5 minutes, but they are all independent stories, telling wonderful love with a very short story length The content has become a major feature of the play. In the play, there is a small fortune in love, a small regret for love but not for love, a cooling after quarrel, and a madness for love, reflecting the truest urban life and creating a miniature "love apartment".

The story revolves around four women who are nearing their thirties, as they support one another and witness each other's growth and change. Xia Yan, Han Shuang, Zhao Xiao Lei and Xiang Nan are close friends since university. After graduation, the four of them live and work in the same city.

Xia Yan aspires to create a quality application that can change how people live. After graduation, she enters the IT industry and with her hard work, becomes one of the project representatives of SG Organization. She also gains true love after a series of tumultuous relationships.

To fulfill her dreams of becoming a designer, Han Shuang, who comes from a wealthy family, decides to jump out of her comfort zone. She starts from the bottom, and becomes a part-timer at a design furniture shop. She and doctor Ma Ke becomes a couple after various struggles.

Zhao Xiao Lei comes from a traditional family. One day before her wedding ceremony, her boyfriend broke up with her. With the encouragement from her family, she finally walks out of the shadow of her relationship and regains her confidence.

Xiang Nan is a doctor, who seems calm and logical, but actually has a closed up inner heart. One day, she met with an accident, which helps her regain her faith in life.

Seo Yoo Kyung endured the gruelling job of kitchen assistant at high-class restaurant La Sfera for two years in hopes of being promoted to chef. Things are looking up as she meets a handsome stranger on the street who ends up being the restaurant's new head chef. His first day on the job, however, he fires all the female cooks, including Yoo Kyung. Yoo Kyung, too stubborn to let go of her dream, she is willing to do whatever it takes to get her job back. Yoo Kyung struggles as she butts heads with the new chef while trying to learn everything she can from him at the same time, and sparks begin to fly. Things are complicated by the presence of Kim San, a charming customer with an eye for Yoo Kyung who seems to have mysterious ties to the restaurant, and Oh Sae Young, a famous TV Chef and former love of Hyun Wook, not to mention the kitchen politics that get in the way of their budding romance.

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A troubled psychologist returns from the U.S. and sets up a clinic in Taiwan, where mysterious patients and uncanny events shed light on his murky past.

A Communist spy serving as an officer of the Japanese puppet regime joins hands with Russian and Korean spies to execute an assassination plot. In the year 1941, Nazi Germany declares war against the Soviet Union. Given that Manchukuo's loyalties lie with Cheng Tian, the Russians are caught in a situation where they face threats on all sides. Their intelligence agency devises a long-term plan in secret. Communist spy Tang Fei (Liu Yunlong) receives a mission to infiltrate the enemy by pretending to be one of their own. At the Security Bureau, he crosses paths with Cai Meng (Han Chae Young), a woman determined to fight against the Japanese regime. They gain each other's trust as they try to outsmart the enemy within their own territory.

Tokino Mitani runs a watch shop, located on a street far from the downtown area. She is 20-years-old and inherited the watch shop from her grandfather. Unknown to most, she is also an excellent private detective and offers an alibi cracking service. She can crack someone's false alibi by using logic based on time and a watch. She gets payed 5,000 yen for that service.

Yoshiyuki Saji used to be an elite police officer, but he tried to uncover corruption within the police department. This caused Yoshiyuki Saji to receive a demotion to a police station in a rural city. He moves alone there, leaving behind his wife and child. He lives at a boarding house, where Tokino Mitani lives. Yoshiyuki Saji does not get along with the other detectives there. He struggles to solve a case and he hears about Tokino Mitani's ability as an alibi cracker. He doesn't want to ask for her help, because of his pride as a police officer, but he requests her help on a case.