Sadhu is a 1994 Indian Tamil-language action film written and directed by P. Vasu, starring Arjun and Raveena Tandon.
The story revolves around Sathyamoorthy (Arjun), who lives with his mother Kamalamma (Jayabharathi) and grandfather in the Boat Club area. After becoming a gold medallist, he faces threats from Narayanan's son, leading to a scuffle that results in his grandfather's death.
Sathyamoorthy and his mother are forced to relocate to Goyya Thoppu area by Narayanan. There, they encounter a tea shop worker who shares information about their past, including the history of Mamool collection by Vibhuthi Veeramuthu (Radharavi) and Narayanan's role in it.
The film features supporting roles from Vijayakumar, Goundamani, and Radha Ravi. It was released on 22 July 1994 and became a flop at the box office.