Mrs. Speculator 1980 on netflix

Mrs. Han who argues with her husband about living expenses. She unexpectedly earns 5 million won over an apartment she sold and becomes a speculator. She teams up with some slanderers and makes big money then soon dissolved into pleasure with men around her. Finally, slanderers trick her and she is broke and nearly mad. The police catches the speculators and they show no regrets. When the verdict is announced, they finally see their wrong doings.