SONG is reminiscing about his days with his mother. All of a sudden, he asks MIU to stay with him for three days and he promises to teach her everything he knows in return if his request is granted. CHO works as hard as he can and finally manages to achieve recognition from his teammates. MIU tries to satisfy SONG in the best possible way. SONG talks in his sleep and MIU learns from his utterances that she is actually supposed to play his mother instead of his ex-girlfriend over these days. MIU finds this so offending that she is resolved to give him a lecture. By making use of SUM in the meeting, SONG gets a chance to ask PO about the possibility of moving CHO back to the central office. Upon his return to the central office, CHO realizes that SUM behaves differently when confronted with PO and himself. All he has been going through finally makes him understand the intricacies of office politics……