Three‑year‑old genius Mopsy, skilled in hacking, combat, music and more, follows her mentor’s instructions to New York in search of her five long‑lost elder brothers, each a top figure in their fields. Initially skeptical of their unexpected little sister, the brothers gradually change their minds as Mopsy solves countless crises and exposes Caroline’s schemes. After many twists, the siblings are finally reunited. Once alone, Mopsy gains precious family love and embarks on a happy new life.