When the star witness in the case against Greg Csonka, the manresponsible for the death of Wes' former partner, isbeaten to death in a Budapest prison before he can testify,the Fly Team attempts to salvage the case to secureCsonka's conviction. As they dive back into theinvestigation, Mitchell is forced to confront the pain oflosing his partner. Meanwhile, Wes assists Booth withpreparing for his promotion interviews.