The Whirlstone

In the Whirlpool of life, the Whirlstone sets our destinies.
Without the Whirlstone, life would be as in a Whirlwind.

The Whirlstone set her pathway in life when she was eleven. She lives in a society that believes itself cut off from the outside world. Chala, tall, awkward and curious discovers the secrets that underpin the hierarchy of her mountain settlement.

Why can she open the magic protected walls? What will be the consequences of contact with other cultures?