CID officer Prakash who operates by the code name 999, is assigned the task of safeguarding a chemical formula. Prakash's struggles begin when a gang of outlaws aim to steal the formula.

Goadalli CID 999 is a 1968 Indian Kannada-language spy thriller film written, directed and produced by Dorai–Bhagavan duo. The film starred Rajkumar in the lead role as a detective. Popular Indian actress Lakshmi made her debut in Kannada cinema with this film. Sri Lankan based actress Sabeetha Perera also made her Indian movie debut with this film. The film had musical score by G. K. Venkatesh with lyrics by R. N. Jayagopal.The film met with highly positive response upon release and paved the way for many more such Bond style of movies in the combination of the director duo with lead actor Rajkumar.

Shekar, a nuclear scientist, creates Plasma Binson, a formula that can destroy any object on earth. Agent 999 is assigned the task of wiping out the formula for good.

Prakash is called in to investigate the theft of diamonds and the kidnapping of scientists; a trail that takes him to distant Nepal.