Licca Kayama, an ordinary middle school girl, discovers a hidden world of sentient dolls known as Doll Knights, who are tasked with protecting the balance between the human and doll realms. When the evil Queen Dorothea threatens to overthrow both worlds, Licca is chosen as the legendary "Doll Savior" to lead the Doll Knights in their fight. Alongside her loyal companions, including the brave knight doll Rio and the mischievous fairy doll Pichi, Licca embarks on a journey to gather the seven magical "Doll Crystals" needed to defeat Dorothea and restore peace.

The narrative unfolds as Licca and her friends face various challenges, battling Dorothea's minions and uncovering the truth about the Doll Knights' origins. Each Doll Crystal is guarded by a powerful guardian, and obtaining them requires Licca to confront her own fears and insecurities while strengthening her bond with her doll allies. The story explores themes of friendship, courage, and self-discovery as Licca grows into her role as the Doll Savior.

Key characters include Licca Kayama, the determined and compassionate protagonist; Rio, a noble and skilled knight doll who serves as Licca's protector; Pichi, a playful and resourceful fairy doll who provides comic relief and support; and Queen Dorothea, the ruthless antagonist seeking to dominate both worlds. The series blends action, fantasy, and emotional moments, culminating in a climactic battle where Licca and her friends must unite to save their worlds from destruction.