When a scheming hostage from an enemy country meets a cold-faced palace maid in disguise, they are a "tearful" miser during the day and a silly "loyal protector", but at night they steal intelligence for their respective countries. During the extreme tension, they had to help each other lie and cover up, and lived a sophisticated life of "acting in front of others, spying behind others, and saying "we are of the same kind" when we wake up in our dreams at midnight."
