Ty and Dean team up to crush a rough-hewn Korean mob boss, but tension grows between the two undercover men when Ty works cautiously and Dean adopts a rash, less careful approach.

The team goes deep in the shadows to trounce a crime ring that is planning a big diamond heist, with Dean and Jaimie establishing rapport with a major player by posing as a married couple. Meanwhile, Melissa informs Ty that she wants to start a family, a development that causes Ty to reconsider his dangerous profession.