In a Spiders' Village suspended high among the trees, a shy boy finds comfort in small, quiet moments. He is the complete opposite of his older sister, a skilled and confident Huntress that he can always rely on. After a humiliating incident leaves him alone and ashamed, she warmly comforts him by wrapping him up in her yellow silky scarf... Later, When a deadly plague descends upon the village, the boy that has now grown into an aspiring Alchemist, is forced to confront his fears. Together with his sister, he embarks on a journey in search of the key ingredient for a life-saving antidote, before it's too late.