The 'Butterfly Hunter' stalks the halls of the sisters' home, leaving delicate wings and teasing notes for the elder sister. Cobie, intrigued and aroused, decides to play detective, her body responding to the thrill of the chase. As she follows the trail of butterfly wings, she discovers her sister's secret fantasies, each one more taboo and tantalizing than the last. Cobie's own desires awaken, and she finds herself not just hunting the hunter, but also exploring her own forbidden longings.