The Korean drama - Knight Flower - tells the story of a funny search story about Jo Yeo-hwa (played by Lee Ha-nee), a widow who has been widowed for 15 years, and Park Soo-ho (played by Lee Jong-won), a guard camp officer who was born with bad luck and is about to marry a 17-year-old girl.

Zhao Ruhua (played by Li Heni) has two appearances. During the day, she is a dignified and martyr girl, and she is also the daughter-in-law of a famous scholar-bureaucrat family. She lives quietly within the walls that cannot see the outside world.At night, she would scale the walls and help others without anyone knowing.Park Soo-ho, the perfect North Korean man with outstanding martial arts and clever mind, was involved in an unexpected incident after meeting Cho Yeo-hwa, who had a double life.

Park Soo-ho (played by Lee Jong-won), Soo-ho is a handsome man with excellent work and the most popular man in the capital.He has been unlucky since he was a child. When he was looking for the reason why his father was brutally killed, he accidentally met the heroine and they searched for the truth with him.

In addition, Seok Ji-sung (played by Kim Sang-joong), Park Yoon-hak (played by Lee Ki-woo), and Yeon-sun (played by Park Se-hyun).