Khun Chai Pawornruj is a young government employee working in the Ministry of Foreign Affairs with a bright future in diplomatic affairs. Although he is the second son of the Juthathep family, he is seen as inferior and labeled the “Khun Chai of the Kitchen” because his birth mother was a concubine of the Juthathep household. Broken-hearted after the girl he had been dating suddenly broke up with him and pushed into a sudden matchmaking from his grandmother, Khun Chai Pawornruj finds solace in receiving a new assignment to go to Switzerland as a diplomat. There, he meets Rasa, who is on her travels in Switzerland with her friends, and they fall in love. However, what he doesn't know is that Rasa is actually Than Ying Wanrasa, daughter of a royal prince. Will this young diplomat let his inferior status as the son of a concubine get in the way of true love? (Source: MyDramaList) ~~ Adapted from the novel "Khun Chai Pawonrut" (คุณชายปวรรุจ) by Romkaeo (ร่มแก้ว).