The four Pevensie children, Peter, Susan, Edmund and Lucy, return to Narnia, only to discover that hundreds of years have passed since they ruled there. Now, crowning himself king, the evil General Miraz has taken charge. The children enlist the help of the the dwarf Trumpkin and a heroic mouse called Reepicheep and set out to find the exiled Prince Caspian, determined to see him rightfully named king.