"The Inverted Periscope" follows the story of a young woman named Camila who inherits her grandfather's antique shop after his passing. While going through the store's inventory, she discovers an unusual an inverted periscope. As she learns more about its history, she becomes entangled in a mystery involving her grandfather's past and the periscope's connection to a long-lost treasure. Camila sets out on a journey to uncover the truth and protect the periscope from those who would use it for their own gain.