A once-thriving coastal city lies in ruins after dragon attacks left it scarred and broken. Tristia's desperate citizens turn to the legendary inventor Prospero Flanka, whose reputation for restoring fallen cities precedes him. What arrives instead is Nanoka, his young granddaughter, sent alone to assess the damage and see if Tristia is worth saving. The city's leaders face a crushing disappointment: a girl in place of a master craftsman. Yet Nanoka carries with her the knowledge and vision of her grandfather's genius. Armed with mechanical prowess and determination, she begins sketching plans to rebuild what was lost, wielding technology and invention as tools for restoration. But saving Tristia means more than repairing buildings. She must confront the scars that run deeper than crumbling streets, earning the trust of a population that has learned to expect failure. This OVA blends steampunk aesthetics with intimate character moments, balancing the grandeur of mechanical innovation against the quieter work of rebuilding hope in broken places. It's contemplative adventure for those drawn to stories where ingenuity and compassion go hand in hand.