The Crowned Clown (2019)

S1E4 The Price of Being a King

Title: The Cost of Royalty Plot: After sharing a cup of tea with the Queen, Seon Hwa Dang becomes gravely ill, leading to a poisoning scandal that spirals beyond the Queen's control. Determined to fulfill his vow, Ha Seon embarks on a desperate quest to rescue his queen. At the same time, Shin Chi Soo executes his scheme to usurp both the Queen and the Queen Dowager, creating a web of intrigue and danger in the palace.