@Soohyun
Spoiler!
Zehnya and Taekjoo infiltrated in a mansion to look for the Anastasia, Taekjoo was in charge of looking through the room of the owner, which he "seduced" and then knocked him out. (the owner actually tried to lure him into a trap so he leads him into his room and drugs Taekjoo but the drug doesn't kick in quite fully until later.)
He then went up to the bed and pressed a button which revealed a photo of the Bognadov family photo, including Zehnya. And then, talking about the king of Rome, Zehnya enters the room and starts talking to Taekjoo about what Anastasia essentially is and in riddles, all that while he r*pes a drugged Taekjoo and almost kills him.
Turns out that Taekjoo had gotten the two photos of his partner for the mission and for the Psikh Bognadov mixed up, and who he thought was Psikh Bognadov was actually his partner for the mission, while Zehnya was Psikh Bognadov.
QUACKITY!!