A burnt and half-eaten megalodon shark corpse is found beached. A priest commits suicide. A previously unknown volcano rises from the China Sea and brings about a tsunami that destroys Shanghai. Yellowstone erupts after 640,000 years of silence. A pit in Nicaragua known as the "mouth of hell" begins violently spewing lava.

When reporter Mick Cathcart and marine biologist Agnes Brach set out looking for answers, they never expected to stumble upon the biblical end times. Yet when sharks made of molten magma start erupting from the volcanoes to devour everything and everyone in their way, how could they deny it?

With the help of a beleaguered priest and a billionaire industrialist, Mick and Agnes scramble to extinguish the volcanoes and blow away the lava sharks before the whole world burns to a cinder.