Mia receives an invitation to a photography exhibition, and so she and Carter embark on a journey. During this time, they meet various mysterious characters who follow and threaten them and get involved in an adventure about a mysterious map and a treasure. They meet Charlie and together they explore clues and experience many crises, including mysterious discoveries at a villa party, being followed and attacked, and a thrilling escape from a castle and a basement. Finally, they have a fierce fight with a mysterious character in a cave, successfully uncover some secrets, and are ready to continue pursuing the truth about the treasure.