Detective Rollins witnesses a kidnapping when she sees a woman screaming for help from the back of a passing cab. After some investigation, Rollins discovers that the cab was stolen and the woman, a 19-year-old girl named Nina, has been reported missing. While interviewing Nina's mother, Benson and Rollins learn that Nina had recently become immersed in the world of body modification and tattoos, and that she'd gotten a number of tattoos and body modifications herself, including a distinctive octopus tattoo on her ankle.