The ecology of small volcanic islands like this are very odd.
“Somewhere, on an oceanic island, the forces of nature are still at work as in primeval times. A young, naive female tiger lives there in harmony with herself and nature. When her awakening femininity is noticed by an older male tiger, the young tigress is getting more and more scared by his heated approach. But it is impossible to escape on the secluded island. The feelings of the young animal are reflected by the volcano island, and with the help of nature, she can finally act upon her own will.”