The Pevensie siblings, Lucy and Edmund, and their cousin Eustace are transported to Narnia after a magical painting overflows water in their room. They join King Caspian and his crew on a quest to find the seven lords of Telmar, whose swords are needed to defeat an evil green mist threatening Narnia.

The Chronicles of Narnia: The Voyage of the Dawn Treader
The Pevensie siblings, Lucy, Edmund, and their cousin Eustace, embark on a perilous adventure aboard the majestic ship The Dawn Treader, navigating through a world of mythical creatures, including dragons, dwarves, and enchanting merfolk.