What is the plot for paint the wind?

Maya is a captive. In Grandmother's house in California, every Word and action is strictly monitored, and even Maya's memories of her mother have been erased -- except within the imaginary world she has created. A world away, in the rugged Wyoming wilderness, a tobiano Paint horse called Artemisia runs free, belonging only to the stars. She embodies the spirit of the wild -- and she holds the key to Maya's memories. How Maya's and Artemisia's lives intertwine, like a braided rein, is at the heart of this richly drawn adventure about captivity and freedom, about holding on and letting go.