After six months working undercover, Andy and Nick’s operation goes sideways when Nick - then Andy - go missing. Meanwhile, a random arrest at 15 Division puts Sam Swarek and the other officers in the middle of the investigation-turned-rescue-mission. Frank proposes to Noelle. Andy works a bank robbery case with Swarek on her first day back at 15. Dov attempts to help an attractive Italian women whose passport has been stolen.