Reluctant hero Hiccup is back in the fifth installment of his hilarious misadventures. Someone has stolen the Fire-Stone. Now the volcano on Volcano Island has become active and the tremors are hatching the eggs of the Exterminator dragons! Can Hiccup return the Fire-Stone to the Volcano, stop the Volcano from erupting, and save the Tribes from being wiped out by the terrible sword-claws of the Exterminators? A fast paced plot, slapstick humor, witty dialogue and imaginative black and white illustrations enhance this exciting tale.