Everyone is missing! Eleven-year-old Emma's best day ever quickly turns into a nightmare. While spending the summer with her grandparents in Lander, Wyoming, Emma enjoys a ride on her horse, Bart. But, when she gets back to the house, the trouble begins. It's empty. No warning, no note, and no one to call leaves Emma shaking in her shoes.When she discovers the reason, Emma finds herself questioning her relationship with God. Even more questions arise after a visit to a struggling horse rescue farm. Seeing the sadness in the faces of so many abused horses, and meeting Tucker, the sickly appaloosa, only adds to the pain of her already broken heart.While Emma works to save the horse rescue, who will rescue her heart?