Ali soon realizes that all the accidents happening on their Hawaiian ranch aren't really accidents. Someone is moving things, setting traps, trying to scare her. She can't tell her mom; her mom is already thinking too seriously about selling the ranch. And besides, Ali knows she can deal with a few practical jokes.

But then the intruder targets her horses. Ali can't understand why someone would want to hurt three innocent horses, but one thing's for certain – she needs to figure it out quick, before something terrible happens!

Then the horses go missing. Is she already too late?