The body is confirmed to be Nan-hee, but it is strange that those who should be most shocked are calm about this. The detectives try to find clues, but it seems the culprit has been pretty thorough. Meanwhile, those who were close to or around Nan-hee when she was alive start to become suspicious of one another. While Hye-ryul is extremely anxious about Kang-baek, Geun-woo receives an anonymous letter.
