The Heroic Legend of Arslan (Original Japanese Version)

Crown Prince Arslan leads a sheltered life, but his curiosity leads him to seek out slaves recently brought back from a successful military campaign. When one of those slaves escapes and takes him hostage, he gets more than he bargained for.

Three years later, Arslan is still training and still sheltered. Peace seems a certainty for the Kingdom of Pars, widely known for its mighty army. But Lusitania is suddenly back and this time, the Kingdom of Maryam falls and Pars faces war.

Daryun finds Prince Arslan in time to save him from Kharlan's betrayal, but Kharlan's treachery runs deep, affecting the course of battle even where he is not present.

Prince Arslan and Daryun seek refuge with Narsus deep in the mountains. Narsus's obvious gift for strategy would be an asset to Arslan, but Narsus is intent on remaining a hermit and dedicating his life to his questionable art.

Now that Narsus has agreed to join Prince Arslan, they must figure out a way to get to Ecbatana without getting caught by Kharlan. And in the meantime, the Lusitanian army closes in on the Royal Capital.

As Prince Arslan and his small company bide their time, the Lusitanian army continues to lay siege to Ecbatana.

Ecbatana falls and the Lusitanian King, Innocentis VII, enters the city to see what he has conquered. And the once-enslaved boy soldier, whom Arslan befriended, returns to search for his old comrades.

Kharlan sets out to hunt down Arslan and Narsus works to turn this situation to their advantage, so that they can finally learn why Kharlan turned traitor.

Daryun and Narsus sneak into Ecbatana to gather more information. Meanwhile, Arslan has an interesting encounter with someone from his past.

Evading pursuit and seeking more allies, Arslan finds shelter at Kashan Fortress, but its scheming lord wants a lot for his cooperation.

Arslan and his small group make their way towards Peshawar Citadel, but they face many obstacles along the way.

The Lusitanians relentlessly pursuing them has forced Arslan's group to flee separately in smaller groups and now, they struggle to make their way to Peshawar and bring their group back together.