"The Three Musketeers" is a South Korean adventure series based on the novel of the same name by Alexandre Dumas. The story takes place during the legendary Joseon dynasty. In the 17th century, Prince So-hyun is preparing to ascend the throne. He is beloved by the people but has many enemies and rivals among the courtiers. However, he has defenders - loyal and devoted warriors An Min-so and Ho Sung-po. When they embark on another mission for the prince, they are joined by the young daredevil Park Tal-hyun.