Sa-ra can tell her change of heart. While her feelings toward Gi-jun are growing stronger, she has to prepare for the death anniversary of her mother with him. Gi-jun finds out that Sa-ra's mother was the informant who had gone missing. Sa-ra finds out that her mother was the Na Yu-mi case's witness and that Na Yu-mi might've not killed herself. She must reveal the truth behind this case, and the keyman is the part-timer Bae So-hee who worked with her mom.
