Faith

The new king of Goryeo and his Yuan queen are attacked by assassins. When the queen is fatally wounded, Choi Young searches for a doctor from the heavens.

Eun Soo saves the queen's life, but she tries to run away, fearing that she's been kidnapped by costumed actors.

Though Choi Young has not fully recovered from his surgery, the king tasks him with another mission to find the traitor among his retainers.

"The king appoints Eun Soo as a royal doctor to strengthen his authority, and Gi Cheol threatens Eun Soo. "

Choi Young loses consciousness, and Eun Soo saves him through CPR. Eun Soo's life is at stake due to Gi Cheol.

Eun Soo and Choi Young are tasked to heal the former king Gyung Chang to convince Gi Cheol that she really is from heaven.