The Last Empress Season 1 Episode 40
The Prime Minister Loses His Edge
To ensure the promise of Princess Ari becoming the empress regnant, Kang Hee gives her recorded testimony of seeing Emperor Lee Hyuk of killing Empress So Hyun to the Prime Minister. However, the Empress gets hard evidence of the two's intimate relationship and intervenes her plot. Meanwhile, the Empress accepts the Emperor's proposal and gets him to tell her what she wants.