Lucy and Edmund Pevensie, along with their cousin Eustace Scrubb, are unexpectedly drawn into Narnia through a magical painting. They join King Caspian aboard the ship Dawn Treader, embarking on a perilous journey across the Eastern Seas to find the seven missing Lords of Narnia. Along the way they encounter sea serpents, a dragon, invisible creatures, enchanted pools, and the mysterious Dark Island. Their voyage culminates in confronting inner fears, true friendship, and ultimately meeting Aslan at the world's end before returning home