Two years after the previous movie, the quest for Echidna and her children has changed. Thanks to the intervention of some humans, they decided to really become better, but they did show their strength to the whole world. Thus, ignoring the agreements between the ancient pantheons signed centuries ago, the Olympians are making their comeback ! With Zeus still at their head, they are clearly threatening towards the descendants of Typhon, who was once their worst enemy, the only one to have defeated Zeus alone. However, most Olympians won't hesitate to take collateral casualties, something Echidna's family members refuse. With some other children of hers back by her side, the "mother of all monsters" intends to end this "divine" family once and for all, even with her offspring they will do everything to prevent it from degenerating into the worst conflict this world has ever known...