This friendly company gathered rich people who had succeeded in business. Their present and future seem cloudless. But then tragic events begin to happen to them. Two of them die under strange circumstances, the third’s most important documents are stolen from his safe... Maybe this is nothing more than a chain of incredible coincidences and nothing threatens the rest of the company? Crime expert Drongo, who is investigating the case, is convinced otherwise. Mortal danger loomed over all friends. But who threatens them? And which of them will be the next victim?..