Two years have passed since the Monster Squad secretly saved the world from a demented project of survivors of the Third Reich, who wanted to exploit the resources of a real lost world to avenge their defeat. However, peace is only a very short-lived thing in this job. The world is threatened again, by another Nazi survivor on the run, but this time who don't seem to be the biggest threat in sight. The Monster Squad, made up of a few new members, begins their mission this time in Saint Petersburg, in order to extradite the mythical Russian necromancer Rasputin, who seems to have collaborated with their enemies. They will discover realize that survivors of the Third Reich are posing as a research team gone to the depths of Antarctica, in order to drill for new matter. However, once there, the monsters will realize that the Nazis have, for once, come across something much more dangerous than them, having found a passage towards the center of the Earth, which turns out to be hollow and where a vast lost empire lies. Thinking at first that the real threat comes from the mysterious reptilians, the worst is yet to come. The Nazis have dug too deep and with too much greed, awakening mythical giants, who want to return to the surface to conquer it ! No man could stop such mythological beings, but perhaps monsters would have their chance...
