Three‑year‑old orphan Mopsy possesses extraordinary strength and is repeatedly abandoned because of her huge appetite. She rescues the badly‑injured Prince Edmund in the mountains and decides he shall be her family. They survive together in a cave, and Mopsy’s kindness gradually wins Edmund’s heart. Facing bandits and human‑trafficking gangs, accompanied by the giant wolf Frostfang, they fight conspiracies and rescue abducted children. Back in the royal city, Mopsy is made a princess and gains a real, permanent family.
