After escaping from the cargo ship, Daisuke and Kambe pursue Shigemaru and arrive at the old site of the 3rd Laboratory owned by the Kambe group, which is the source of all the mysteries. Daisuke confronts Kikuko, the head of the family, with his burning questions, but her answers force him to make a crucial decision. The truth behind the tension and conflict between the three generations of the Kambe family becomes clear.