Two friends meet for dinner in a classy unagi restaurant, and get distracted by an apparently young girl who is confidently dining there alone. Somehow, this leads to talk of murder...

Kotoko offers her own explanation of Sumi's death, which awakens the memory of a crime that had slept for decades.

Rion talks to her father and, realizing something important about her grandmother, proposes an answer to the president's assignment to her relatives.