4 predetermined (as in participants don't choose who their partner is, but the pairings are set up by the PD) couples are allotted a certain amount of money ($20, $40, etc) to prepare dinner for themselves. The participants try to portray themselves as a real life couple and go out together to buy groceries for dinner. It then follows them to a mock home where they prepare the dinner and eat. In between scenes there are interviews with the participants asking questions like what they feel about their partner and what they like or don't like about him/her. The actual date together as a couple and the interviews are all prefilmed and the participants and MCs watch it all back. At the end, each side of the couple privately chooses if he/she would stay together with his/her partner or not.

Romania, 2005. One of the last vampire families on earth decides to disguise themselves and live among humans until "the glory of their empire" revives. They are sent to different places all over the world that are considered safe by their leader.

However, a group of vampires takes the wrong ship and happens to come to Korea. On board, they run into a timid and unlucky man Doo-il. One of the vampires bites him by mistake and he becomes one of them. They promise Doo-il that they will return him into a human on the day when their leader comes to find them. He doesn't have any other choice but to live with them. They are disguised as a family of five and start new lives in Seoul. Can they really go back to their country safely when their leader comes to find them?

While watching the vampires who disguise themselves as a human family, the viewers will witness both their human sides and the humans' inhuman sides. Can Seoul be a safe place for them?