Gray and his alliance of peaceful shivers--Riptide, Coral, and AuzyAuzy--have beaten the bloodthirsty emperor Finnivus and his vicious Indi Shiver armada to smithereens, sending them swimming as fast as they can retreat. But there's no time to party. Finnivus may have been humiliated, but he's still out for revenge. This is the ruler who feasts on the heads of every shark he conquers, after all.