The Last Empress - Season 1 Episode 51 The Emperor’s Vengeance

Sunny recuperates from the blast with Hyuk at her side. When she wakes, he tells her that it was Na Wang Shik who was behind the attack. Later, at a press conference held at the palace, the Empress Dowager affirms Na Wang Shik as the attacker, and when questioned about the Empress's accusations, she pins it all on the Emperor. Shattered by his mother's words, Hyuk dresses up as Na Wang Shik and carries on with his vengeance to destroy the palace. Meanwhile, someone buries Wang Shik next to his mother's grave.