Finn stood on the golden beach, holding a glowing seashell he had found that morning. Strange buzzing sounds came from inside. Dr. Marina walked over, scanned it with her instrument, and said in surprise, "This is a deep-sea distress signal!" Shell, an ocean spirit, jumped out from the seashell and whispered, "The ocean is calling... the sea needs help..." Finn's eyes lit up. He knew a new adventure was about to begin.
Dr. Marina led Finn aboard an exploration ship heading to a mysterious island. This island had never been thoroughly explored, and legend said it held secrets of the ocean. The ship sailed slowly, sea breeze blowing gently, seagulls flying freely in the sky. Shell said, "This island is home to ocean spirits..." Suddenly, they noticed strange fog surrounding the island.