Romance Zero is a 16 epsiode drama which mainly focus on 4 different characters who work at a wedding planning company or match making company. While they help others find romance, they themselves have a hard time finding one true love.Each episode will carry different love story involving their customers

Kwak Sun Young gets into a car accident and develops this ability of detecting a man's past from his body odors. She divorces her husband when she finds out about his long history of girlfriends. Sun Young then sets up a business where she helps women and even the police track down suspicious men and husbands.

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.