Envoys

Boimler is assigned to a mission to transport Klingon general K'orin to the United Federation of Planets Embassy on Tulgana IV. Mariner has herself assigned to the same mission, revealing that she is old friends with K'orin. The pair drink and reminisce while Boimler flies them to the planet. After they land, a drunken K'orin steals the shuttlecraft. While tracking down K'orin, Boimler feels he is unprepared for field work compared to Mariner, and threatens to quit Starfleet. They are offered assistance by a Ferengi who Mariner believes is trustworthy, but Boimler cautions against this and is proven correct when the Ferengi pulls a knife on them. Boimler scares the Ferengi away. The pair find K'orin and leave him at the embassy before returning to the Cerritos. Boimler teases Mariner about how he was the one to defeat the Ferengi, unaware that Mariner had staged the incident.

Summary from Wikipedia, CC BY-SA 4.0.