Saathi (1968 film)

He meets with Nurse Shanti, who lives an impoverished lifestyle with her ailing mother, on whom he decides to perform surgery, but she passes away.

Hoping to travel more, their plans are interrupted by the hospital's head doctor, who wants Ravi to focus on cancer research.

A frantic Ravi searches high and low in vain and is subsequently devastated to learn that she has perished in a train accident.

An embittered Rajni feels neglected and decides to confront him, resulting in his losing his vision, perhaps never seeing again, and unable to do any further cancer research.

After listening to the songs, Naushad wrote a letter to M. S. Viswanathan saying that he cannot replace the wonderful music which he has composed and he's declining the project.