Park Sang Won left a word of warning and advice for Lee Min Ho.

On the Tuesday episode of SBS "Great Doctor, " Choi Young (Lee Min Ho) goes out to find Duk Heung, who had poisoned Eun Soo (Kim Hee Sun) and tried to take the throne from King Gong Min (Ryu Deok Hwan). 

Choi Young goes to find Son Yoo (Park Sang Won), a diplomat from the Won Dynasty, who could only say that Duk Heung was already headed towards Won.

Son Yoo says, "I heard from Duk Heung that the doctor has been poisoned. The poison does not have an antidote. I met her and knew she wasn't from this world but I left her because it was clear that she was going to die. If you stay with her, you might die because of her so don't have her at your side. I'm giving you advice because of what little loyalty I have left to Koryo."

Choi Young says, "I'm going to die because of the doctor?"

Son Yoo says, "You might. Also be careful of Prince Duk Sung. That's all I can say."