Three‑year‑old butcher‑shop boss Mopsy applies for a companion position at the wealthy Sterling family to save her failing shop. With down‑to‑earth daily warmth, she gradually wins over seven‑year‑old Owen, who suffers from selective mutism, helping him speak and eat normally. She fights against malicious schemes from crooked meat‑sellers and heals the whole family. With childlike purity and courage, she protects her loved ones and gains precious affection and a sense of belonging.