Hoàng Cúc

To faces many difficulties working as the director of the A1 hydropower project. Workers do not believe in leadership, so they quit their jobs. To boldly proposes a new way of doing business, paying attention to workers' lives and improving technology. The workers believe in him, returning to the construction site with a new attitude. Han, To's friend reports to the Minister about him with bad intentions, spreading news about his relationship with female engineer Thu Hien. To overcomes those barriers by working hard. The Minister has created all conditions for him to be creative and work.

The battle for political power in the Trịnh clan continued after the death of Lord Trịnh Sâm in this sequel of "Night of Long Tri". The rivals were two famous concubines of Trịnh Sâm: Dương Thị Ngọc Hoan and Đặng Thị Huệ.