After Gamera self-destructs to destroy three Gyaos in 1973; the tale picks up 33 years later in 2006, when the son of one of the survivors of that incident finds an unusual egg, from which a baby turtle hatches. The boy, Toru, raises the turtle, quickly realizing it as being remarkable in that it hovers and breathes fire. The turtle quickly outgrows the house, is relocated by Toru and his friends to maintain secrecy and then disappears.