Rachel had always been fascinated with the mysteries of the sea. She dreamed of exploring the （deep）of it and discovering unknown creatures. Her obsession intensified when she discovered an old map in her grandfather's attic（顶楼）, which showed a place marked "hidden treasure". Ignoring her mother had warned, she started a small-boat adventure. After hours of searching with no luck, a friendly giant octopus appeared, guiding her to a secret cave she found treasures beyond her wildest dreams. From this experience, Rachel （know）that the bravest seekers often find the greatest treasures.
