To track down the infamous arms dealer Dan "Daniel" Valdano, Jake and Terry go undercover at an illegal gambling club, but when Holt gets involved to coach the two in the art of poker, his addiction resurfaces. Meanwhile, Boyle buys a food truck that was formerly used in a brutal string of murders without telling his investor, Amy, and Hitchcock and Scully challenge Rosa to a "Butt-lympics".

Jake and Amy attempt to get their parents to bond over Thanksgiving dinner, but their first holiday together as a family does not go well. Meanwhile, at the precinct, Holt and Kevin's special Thanksgiving pie is stolen from his office and Holt searches through the ranks for the possible culprit.