Based on the second novel in CS Lewis's Chronicles of Narnia series, Prince Caspian finds the four Pevensie children, Peter (William Moseley), Susan (Anna Popplewell), Edmund (Skandar Keynes), and Lucy (Georgie Henley) whisked away from WWII England into Narnia, where the siblings once ruled as royalty.

The Pevensies soon discover that 1,300 years have passed since they left, and the world is now controlled by the Telmarines, humans who long ago banished the magical creatures of Narnia to the wilderness. When the heir to the Telmarine throne, Caspian (Ben Barnes), survives an assassination attempt, he stumbles across Narnia's exiled enchanted population, and decides to lead them in an uprising.