Now that he's officially back at the precinct and desperate to solve a real case, Jake finds a loophole to get out of his temporarily designated desk duty. Unfortunately, that loophole rests on his ability to pass an official evaluation performed by Holt. While Charles provides Jake with moral support, Terry and Amy help Rosa, who believes Pimento may be cheating on her.

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".