Nightline follows students who struggle with substance abuse -- including alcohol, meth and fentanyl -- as they fight for their recovery in hopes of graduating from Denver’s 5280 High School. Subscribe to ABC News on YouTube: https://abcnews.visitlink.me/59aJ1G ABC News Digital is your daily source of breaking national and world news, exclusive interviews and 24/7 live streaming coverage. Download the ABC News app for the latest headlines and alerts: https://abcnews.go.com/devices Watch 24/7