Arslan, the future ruler of the powerful kingdom of Pars, which lies at the crossroads of the East and West trade routes, faces a daunting challenge when the pagan nation of Lusitania launches an invasion. As a reserved and inexperienced young man, Arslan encounters the horrors of war for the first time. His deepest fears come true when the Parsian army falls victim to a Lusitanian trap and suffers a devastating defeat. With the help of the steadfast and loyal warrior Daryun, Arslan narrowly escapes with his life. Together, they prepare to resist the invasion and the harsh twists of fate that threaten to engulf Pars.