Physiotherapist Kim Dan has experienced bad luck for as long as he can remember. Among them is his sick grandmother, a loan shark who always threatens his life, and an old boss who makes it almost impossible to get a job, and really has no other choice. Of course, it felt like a dream came true when he was finally hired to take care of the highest paid MMA fighter, Joo Jaekyung, especially when the man then contacted him for treatment the night before the match with a very tempting offer, which was five thousand dollars. He admitted to having a "curse" that requires a certain type of "care". Dan knew, if Jaekyung might be a beast in the ring, but he was more rude in the bedroom, and Dan wasn't sure he could survive Jaekyung at the most difficult moment. However, the promise of much-needed cash made Dan agree to this fateful deal... Could it be that one night together is the thing that can help Jaekyung break this curse forever?