Silmido (Korean: 실미도) is a 2003 South Korean action drama film directed by Kang Woo-suk. It is based on the 1999 novel Silmido by Baek Dong-ho, which in turn is based on the true story of Unit 684. Some parts of the film are dramatizations, as the actual details of certain events remain unknown. The film was both critically well received and a financial success, and was the first film in South Korea to attract a box office audience of over 10 million viewers.