Kokhono Megh (1968)

While on vacation, art teacher Seema Rai meets a charming stranger called Narayan Chaudhary. The pair strike up a friendship. Returning home, she finds her apartment ransacked and is informed that her wayward uncle has been murdered. She barely knew the uncle, but she learns that he was involved in diamond smuggling. The other smugglers, whom he once double-crossed, begin to pursue Seema, believing she is hiding their share of a fortune in diamonds. Narayan comes to town, and Seema finds solace in his companionship. But can he be trusted or does he have ulterior motives?