Ravichandra (1980)

Ravi is an enterprising businessman with a blind mother, a doting wife, a young son, and a dog. His employee Jaani misappropriates company money and Ravi angrily orders him to make up for the loss within one week. Jaani finds petty thief Chandra, who resembles Ravi. He schemes to kidnap Ravi, plant Chandra in Ravi's place and grab Ravi's property, which is worth few crores. Ravi is kidnapped while on a business trip and placed in Goa; Chandra arrives at Ravi's house as Ravi. The dog keeps barking and the son won't come near him, but Ravi's mother and wife still don't figure out that it's not Ravi. Jaani keeps pushing Chandra for the location of the family treasure and property papers. Unknown to others, Chandra has married a prostitute's daughter and promised her a better life. Chandra's wife befriends Ravi's wife and Chandra has a tough time keeping his secret. Chandra fakes illness to avoid spending nights with Ravi's wife. As fate has it, Chandra's secret is found out. Ravi's mother takes Chandra inside the safe-house and tells him Chandra has saved her daughter-in-law's honor and property is worthless for the moral uprightness Chandra has shown. Chandra, lost for words, collects the property-papers and jewels and rushes to Jaani. He says Ravi's signatures are needed to transfer the property and he wants his share right away. Jaani takes Chandra to the den where Ravi is kept. Chandra beats up Jaani and his cohorts and frees Ravi and his family. The film ends with Chandra formally being inducted into Ravi's family as his brother.