Song Lang is a 2018 Vietnamese musical drama film directed and edited by Leon Le, and is also his debut film. The film is produced by Ngo Thanh Van and Irene Trinh, based on the script written by Leon Le and Nguyen Thi Minh Ngoc. The film is produced by The Creatv Company and Studio68 and distributed by Lotte Entertainment, with the participation of Isaac, Lien Binh Phat, Minh Phuong, Tu Quyen, Kieu Trinh and Thanh Tu. Set in Ho Chi Minh City in the 1980s, the film revolves around the relationship between Linh Phung, the lead singer of the cai luong troupe Thien Ly, and Dung, a debt collector from a cai luong family. Throughout the film, cai luong music is highlighted and plays a leading role in the entire story line. The film's title itself is also named after a musical instrument that plays the role of keeping the beat in cai luong.