29 years old Baek Dohee who felt hopeless and skeptical about her life and dreamed of escaping from a frustrated heart, meets Jun Won in place of her friend, Nuri. Due to an unknown attraction, they end up having a one-night stand, but at the climax, Dohee passes days without meeting Jun Won in order to forget that day.

Dohee reunites with Jun Won, who has taken the position of team leader. However, Jun Won who shouldn’t be able to remember “that day”, clearly remembers Dohee and everything that happened that night. No matter how hard she tries to push him away, she’s still dragged towards him who approaches her recklessly.

Can the two men and women who became emotional hedgehogs for their own reasons, will be able to break down the wall and be happy together?