Complex sentence: Vanquished in the first film, the evil Snow White returns to life, setting out to seek revenge on those who ruined her plans to rule the world, and it is up to young Ellie and her friends to stop her again.
Split into simpler sentences: Vanquished in the first film, the evil Snow White returns to life and sets out to seek revenge on those who ruined her plans to rule the world. It is up to young Ellie and her friends to stop her again.