Kang Woo-ram is busy preparing to get a job. Lee Hyun-ji is a would-be anchor, but she works at a homemade hamburger restaurant. One night, Woo-ram visits the hamburger restaurant and orders a double patty hamburger, which has a "buy one, get one free" sale. This is how their relationship begins.
Dragon Inn takes a case of a missing girl. She had no reason to run away from home, which makes the situation quite suspicious. While investigating her case, they find out that a pseudo religion is implicated. Trying to find more information of the girl, Seung-jin makes a mistake and their location and identities are exposed. Will they be able to defeat the cult and save the girl from them?
‘Dragon Inn’ looks like an ordinary Chinese restaurant but in fact, it’s a safe house of an organization that executes revenge for people who are in difficulties. The five members, Cheol-min, Ji-hye, Seung-jin, Yong-tae and the Boss are gathered for their own different reasons. One day, a murder case related to an infamous entrepreneur happens. Even worse, the victim turns out to be a friend of one of the members of Dragon Inn…
One day, during a university festival where people are often known to find a partner, the 3 incredibly single members of the robot club decide to attend. There the sloppy and timid Hwi-so meets a very aggressive girl by the name of Hye-jin. His romantic advances, which he learned through reading books and watching YouTube, finally wake up to make their move. But will two finally become one this fall?
Jae-hoon recently breaks up with his girlfriend and he still cannot give her up. Whenever he gets drunk, it has become a daily routine to call her and act out of drunkenness. On the other hand, Sun-young also decides to break up with his boyfriend. But she holds a grudge against him. For them, it seems that the beginning and the end of a love affair are both difficult. Can they overcome from the previous romance and start the new one?
Prospective writer Aeng-Doo lives with So-Young, Yoon-Jin and Na-Eun. Aeng-Doo and her 3 friends do not have much in common except that they all don't have boyfriends. One day, Aeng-Doo happens to find a rejected work from an annual spring literary contest on the street. Since then, the lives of Aeng-Doo and her 3 friends begin to slowly change.
Star baseball player and national hero Sang-nam finds his career in jeopardy when he gets involved in a drunken brawl. His promoter, Charles, advises him to volunteer his time somewhere sympathetic to improve his public image. The place: a school for the deaf. The service: coaching its baseball team.