Hades is not happy. His favorite pet Cerberus has escaped and is rampaging through mythic Greece. Now the Nemean Lion, the Stymphalian Birds, the Lernaean Hydra, the Minotaur are just some of the monsters in the countryside and there are too many souls in the underworld.
The Greek heroes must band together to save their country from the predication of monsters. Atalanta, Bellerophon, Hector, Theseus, Orpheus, Penthesilea, Perseus, and Medea are the stalwart heroes of legend.
To capture Cerberus they must defeat the other monsters first. By making careful choices, and calling upon the gods, they will be able to grow in strength.
Ultimately they will either placate Hades or die trying.
The only difference, after all, between arete and hubris is whether or not you fail.