In 1937, a Chinese martial artist returns to Shanghai to find his teacher dead and his school harassed by the Japanese.

In a small Japanese village, a young woman discovers the means for her revenge, while Gyaos birds are sighted around the world and humankind debates Gamera's allegiance.

A hibernating species of giant carnivorous birds is awakened on a Japanese island shortly after the military encounters an unidentified mass moving beneath the water off-shore.