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".
Spoilers ahead. Coverage follows the scope labeled below.
Complete story — includes the ending
Jake and Terry propose to join an underground gambling ring to catch a criminal. However, in the process, Captain Holt relapses into his old gambling addiction. Charles is planning a new food truck venture and ropes in Amy as an investor, only to later tell her that the truck he bought was the scene of a notorious murder. Rosa accepts Hitchcock's and Scully's challenge when they say she can't sit all day like they do.