"Raaz" is a popular Indian horror film series that began with its first installment released in 2002. Directed by Vikram Bhatt, the film revolves around themes of love, betrayal, and supernatural elements. It tells the story of a couple who encounter mysterious and terrifying events after moving into a haunted house. The franchise has seen several sequels, with each film exploring different characters and storylines while maintaining the core horror theme. Notable entries include Raaz: The Mystery Continues and Raaz 3D. The series has gained a significant following and is known for its engaging plots and music.