Toru Aizawa, a 11 year old boy suddenly finds a tiny egg on a red mysterious stone. the egg hatches and comes out an abnormal little turtle (Toto) which not only grows rapidly, but also flies in the air and even blows fireballs. At the meantime, a series of mysterious ship wrecks are reported. Later on, even more disasters happen when a huge evil ferocious monster Lizard (Zeus) suddenly comes out from the sea and attacks, wrecks and demolishes the world. the last hope of mankind relies on the friendly great monster, Gamera, which looks similar to Toto, but disappeared 33 years ago. Is Toto the descendant of Gamera? is Toto able to fight against the huge evil?