These mountains had existed here since countless ages past
Most believed they were merely a part of the landscape
Nobody knew the truth which lay in wait
Humanity’s complacency is shattered by the appearance of the “white gauna”, monsters which consume people to fuel their growth. One mysterious man, Denji Kudo, has the ability to transform into the one weapon capable of defeating them; a hybrid entity known as a “black gauna”, and throws himself into a fierce battle to protect the human race. But who are the 4th Chronicle Group, observing the unfolding events from the shadows? And what is the true goal of the murderous white guana?