Saagar (1985)

Raja, a fisherman is secretly in love with Mona. When wealthy Ravi comes to live with his grandmother, Kamladevi, he sees Mona and falls in love with her. Mona also reciprocates his love. Raja is devastated by this turn of events. But when Kamladevi gets to know that Ravi is seeing Mona, she puts pressure on Mona to give up Ravi and marry someone else.