Hithawathiya (1984)

Sarath is employed in Maheshi's father's factory. Sarath and Lalitha are in love. Lalitha and her mother visit Wasantha's house one day for dinner. Wasantha spikes Lalitha's drink and forcefully has sex with her. She wakes up and is in shock. Sarath feels the sudden change in Maheshi and sees them together for himself. He in turn gets involved with Maheshi.