The series follows Yoon Se-ri, a South Korean chaebol heiress who is swept across the border by a tornado while paragliding and lands in North Korea. She meets Ri Jeong-hyeok, a captain in the Korean People's Army, who hides and protects her. Despite the political division between their countries, they develop a romantic relationship. A subplot involves Gu Seung-jun, a fraudster seeking refuge in the North, and Seo Dan, a musician and Jeong-hyeok's fiancée.