Kim Hye Soo is one step closer to finding the person responsible for the late Crown Prince's death as "Under the Queen's Umbrella" episode 14 focuses on the new villain.

Apart from the surprising revelation, the historical K-drama reached a new all-time high for the show.

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One of the main highlights in "Under the Queen's Umbrella" episode 14 is about the true identity of Physician Kwon.

After the physician presented three possible poisons used to the late Crown Prince, a court lady reported that a victim seemed to have the same signs similar to the royal's death.

Queen Im Hwa Ryung found out that gansu was the poison used by her son and does not react to metal; hence why it is not easily detected.

As soon as she confirmed this observation, she headed to the deposed Queen Yoon's residence; however, she noticed something odd.

Her son could walk straight and recalled Physician Kwon's walking style.

She was stunned to know that the last grand prince is none other than Kwon O Gyeong.

Here she confronted the former Queen and asked if she knew about her son poisoning the Crown Prince.

Queen Yoon got honest and said that she would not stop her son from doing it, hinting at revenge on Queen Dowager Cho.

IN CASE YOU MISSED IT: 'Under the Queen's Umbrella' Episode 13: Kim Hye Soo About to Face a Surprising Secret

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Written by Geca Wills