Ek Hi Maqsad (1988)

Indu lives a middle-class life with her widower dad. She attends college, meets Raj, and and they fall in love with each other. Raj follows Indu everywhere, including a picnic, to the chagrin of her professor, but Indu shuns her and sings and dances with Raj, then they take off on his motorbike. Some goons attempt to molest Indu, a scuffle ensues, she is abducted and subsequently thrown down a cliff, and the car with the molesters in it explodes. Thinking that Indu is dead, Raj loses his mind and is institutionalized in C.T. Mental Hospital under the care of Dr. Ram Kumar Verma. When Raj gets better, he is discharged, finds out that Indu is still alive, and goes to meet her and attempts to get intimate with her. It is then her husband, none other than Dr. Verma himself walks in, sees them together, and decides to kill them. He succeeds in killing Raj, but before he can kill Indu, he is arrested and institutionalized in the very same hospital where he works. One day he breaks out to finish his one and only mission: to kill Indu at all costs.