Here's what to expect in tonight's ep.15 - Eun-Soo's (Kim Hee-Seon) is poisoned and her life hangs by a thread. Jang Bin (Phillip Lee) warns that she might not be able to survive another day. Choi Young (Lee Min-Ho) then goes to Prince Deokheung (Park Yoon-Jae). Prince Deokheung demands huge terms in return for the antidote which can save Eun-Soo's life. Meanwhile, Eun-Soo, teetering between life and death, remembers something that she did not know before.