On June 14, 2013, 19-year-old Adrienne Salinas and her two roommates are hosting a party at their apartment in Tempe, Arizona. The party is in full swing when Adrienne suddenly decides to leave. She gets in her car, drives away, and never returns home. In the days that follow, her family and friends work side by side with Tempe PD searching for Adrienne. When her body is discovered in a desert river basin, 35 miles awhile from her Tempe home, investigators suspect foul play. When all of their leads become dead ends, the case goes cold. But two years after Adrienne's body was discovered, a local man calls Tempe PD with a tip that his best friend, known around town as The Zombie Hunter, could be connected to Adrienne's disappearance and mysterious death.