Adopted from the streets of Nasaf by King Sharaman of Persia(Ronald Pickup), young Dastan(Jake Gyllenhaal) grows up amongst royalty and quickly earns his place as a mighty warrior and prince. As his brothers Garsiv(Toby Kebbell) and Tus(Richard Coyle) plan battle strategies, a spy sends word that the Holy City of Alamut has been supplying weapons to enemies of Persia. Taking matters into his own hands, Tus orders an attack on the sacred city and upon its fall Dastan encounters the beautiful Princess Tamina(Gemma Arterton). When King Sharaman dies under mysterious circumstances shortly after, and Dastan is accused of his murder, he flees with the princess on a harrowing mission to clear his name. Learning from Tamina the true motives behind Alamut's invasion, Dastan must embark on a perilous quest to stop an evil mastermind's plot for ultimate power with a mystical weapon that can control the very fabric of time.