When a devoted mother gets abducted by three dark entities into an alternate reality, a young girl, along with a sentient doll and a sly cat, must venture into the world to save her or she will never see her again.

Leaning towards:
“When three dark entities from an alternate reality abduct a devoted mother, a young girl with a sentient doll and sly cat comes to the rescue.”

What’s the intent of the three baddies for the mother? Use the answer to complete the rescue plan rewrite.

I hope you find this constructive. Take care.