An 18-year-old girl is stabbed to death in a bathroom of a popular Miami nightclub. Horatio learns that the victim, Jenny Price was an investigative aide working for Alcohol Beverage Control and was monitoring underage drinking. However, the case gets more complicated when they discover another murdered victim inside a nearby crashed car. Meanwhile, Calleigh and Ryan work together to determine whether an insecure and underage teenager at the club that night had anything to do with the murder.