A Thundarr/Xena/Hercules Crossover, with a little Frank Miller's 300 thrown in for good measure. Thundarr, Ariel, and Ookla chase the defeated wizard Vashtar to Greece. When they catch up to him, he hurls them back through time to Ancient Sparta. Now Thundarr & his friends must find The Kronos Stone in order to return home. Along the way they make some new friends . . . and enemies