The sequel to 300, is actually part prequel, crosses the original story, then finishes it off. It tells you the back story of Xerxes and how he came to be "god" to the Persians, plus introduces us to the über-evil Artemisia who leads his navy. And that introduces us to where this film it set, at sea. Lots of naval battles, lots of semi naked men jumping boats lopping off arms, legs, heads with cgi blood sploshes going over everything. This is a film designed for spectacle and complete over the top battles, so just sit back and watch the carnage. There is a minimal story bubbling underneath with new guy Themistocles rallying the greek factions together, but who really cares? The 3D actually looks quite good with spears, axes and heads flying out at you. As long as you don't expect more that the first movie, you'll enjoy this.