Peter Kasimsiman (Vice Ganda) is an abused child who escapes his father’s cruelty. His life changes when Helena (Eugene Domingo), a golden-hearted haciendera adopts him. And when Helena passes away, he becomes the sole heir of the hacienda. This turns Peter into a power-tripping cruel master. His evilness takes a turn for the worse due to his insecurities with Samantha (Sam Pinto), the beautiful and gifted daughter of Maita (Candy Pangilinan), a longtime servant of Helena.
Peter resents the attention given by the men to Samantha, which he wants for himself. Diobayo (Eagle Riggs) who is the goddess of horses gives Peter a hard-earned lesson. Each time he shows hostility, he transforms into a horse and is named Petra. How long can Peter keep this secret? Can Peter surpass this curse and be free from it?