Jhuk Gaya Aasman (1968)
This story has been borrowed from a Hollywood movie of 1941 - Here Comes Mr. Jordan which had been remade as Heaven Can Wait (1978). The story revolves around our hero Sanjay (Rajender Kumar) who is a tourist guide in Darjeeling and lives a happy-go-lucky life with his friend Hanuman (Rajendra Nath) comes across our heroine Priya (Saira Banu) who has arrived from Calcutta with her college group. Quite expectedly, they fall in love with each other. But after Priya is back to the city because of the news of her father's arrest, Sanjay dies in a mishap. Now when his soul reaches Yamraaj (the Death God in the Hindu mythology), it is known that the Yamdoot sent to bring the soul of his double Tarun Kumar Saxena, has erroneously brought him because of the sameness of faces of these two. Sanjay requests Yamraaj to send him back into his body but now it is not possible because his funeral has already taken place. So, as the last resort available to him, Yamraaj infuses Sanjay's soul into the dead body of Tarun Kumar aka TK who was been a corrupt man in his life, doing all types of bad things in the company of Prem Kumar (Prem Chopra) who had created a rift between him and his grandmother (Durga Khote).
Now Sanjay in the body of TK, is close to his sweetheart Priya because his new home is also in Calcutta where Priya lives with his father who earlier worked for TK (and had got arrested by him only) and well-acquainted with his grandma too. However he, originally being an honest and noble person, is very uncomfortable because of the tainted past of his new body. He now starts correcting the wrongdoings of TK, patches up with his resented grandma and keeps distance from Prem. Prem, not being aware of the truth that it is Sanjay in the body of TK, makes his own moves on the chessboard of business, power and glamour and finally masterminds a murder to frame TK. Finally the movie reaches its happy ending with the baddie being arrested and the lovers being united.