Former high school football star, Nick, and his girlfriend, Emily, were once happy, popular kids from well-to-do families. Now both heavily addicted to carfentanil, an opioid 10,000 times more potent than morphine.Former high school football star, Nick, and his girlfriend, Emily, were once happy, popular kids from well-to-do families. Now both heavily addicted to carfentanil, an opioid 10,000 times more potent than morphine.