This time, animal photographer Iwago Mitsuaki searches for cats on the islands and seaside towns of the Genkai-nada and Hibiki-nada Seas in Fukuoka Prefecture. On Himeshima, which floats in the Genkai-nada Sea, Iwago comes across a cat that he likes at the port in the morning and gives it a name. The boss cat of a shopping street in Kitakyushu is not good at fighting, but he is a caring leader. On Ainoshima Island in the Hibiki-nada Sea, he comes across a cat looking out to sea on the sandy beach. Here too, Iwago gives it a name. He also photographs cats on Chishima Island and the Itoshima Peninsula. Finally, he returns to Himeshima and is moved by the sight of the cats living tough lives in the twilight.