Marina Duck is many things. She's the eldest of the Duck siblings and the only niece to Donald Duck. She's fair, just, incredibly loyal, and can be a bit cheeky. But overall, she wants to keep her family safe. But when thrown into a world of high-stake adventuring, long lost relatives, and repressed memories, not to mention secret agencies, superheros, and high-tec laboratories, she begins to realize that the world is a whole lot more dangerous than she originally thought.