A hotel chain magnate asks Kotoko for help in solving a murder… that he may have committed.

The heirs to the hotel chain begin discussing what they're going to tell Kotoko, but some unexpected details come to light.

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

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