During a peaceful lunch, the fiery Lina Inverse and her companion Naga the Serpent find themselves in the midst of chaos as the town braces for an invasion led by Marlene Culvert and her fierce dragons. The reason behind this unexpected attack? A heated dispute between Marlene and her father, the king, revolving around her finances. Lina, known for her quick wit and magic prowess, steps up to protect the village from Marlene, her loyal knights, and the menacing dragons. However, her go-to Dragon Slave spell proves ineffective, throwing her into a challenging showdown. Just when victory seems within reach, a more daunting conflict unfolds before her.