DEPOSIT OF HUGE MONEY

1. The sources needed to be explained. Otherwise the same will be categorized under sec 69A which deals with unexplained money and the same will be subject to tax @ maximum marginal rate. 
2. In your case, the proper explanation should be provided for notice sent by the IT department relating to the source of Rs. 78 lakhs deposited over a period of time. If no explanation offered or explanation offered is not satisfactory then it will be charged to tax u/s 69A. 
Please correct me if the above solution has an alternative view.