Le Monde De Narnia : Chapitre 2 - Le Prince Cas... -

When Miraz has a son of his own, Caspian’s life is in danger. He flees into the woods with a Great Horn (the ancient horn of Queen Susan). When he is cornered by Miraz’s army, he blows the horn, which is what magically summoned the Pevensies back to the land to help him.

One year after their first adventure, the Pevensie siblings (Peter, Susan, Edmund, and Lucy) are sitting at a railway station when they are suddenly pulled back into Narnia. However, they quickly realize that while only one year has passed in England, 1,300 years have passed in Narnia. Their once-grand castle, Cair Paravel, is now a ruin. Le Monde de Narnia : Chapitre 2 - Le Prince Cas...

It sounds like you're diving back into the world of C.S. Lewis! Since The Prince Caspian story is a classic, The Plot of Prince Caspian When Miraz has a son of his own,

Narnia has been conquered by a race of humans called Telmarines. They have silenced the "Old Narnians" (the talking beasts, dwarves, and fauns), driving them into hiding. The land is ruled by the cruel King Miraz , who has usurped the throne from the rightful heir: his nephew, Prince Caspian . One year after their first adventure, the Pevensie

While the battle rages, Lucy and Susan find Aslan , who has returned to awaken the very trees and rivers of Narnia. Peter fights Miraz in a one-on-one duel to buy time. Ultimately, the Telmarine army is defeated not just by swords, but by the magic of Narnia itself being restored.

The Pevensies join forces with Caspian and a motley crew of Old Narnians—including the brave mouse Reepicheep and the dwarf Trumpkin . They face a desperate battle against Miraz's superior military force at Aslan's How.

Caspian is crowned the rightful King of Narnia. Aslan tells Peter and Susan that they have grown too old and have learned all they can from Narnia, meaning this will be their final trip to that world, while Edmund and Lucy are told they may return one day.