Untold Scandal is a 2003 South Korean romantic drama film directed by E J-yong, and starring Bae Yong-joon, Jeon Do-yeon, and Lee Mi-sook. Loosely based on the 1782 French novel Les Liaisons dangereuses, this adaptation takes place in late 18th century Korea, during the Joseon dynasty.

Les Liaisons dangereuses is a French epistolary novel by Pierre Choderlos de Laclos, first published in four volumes by Durand Neveu from March 23, 1782.