When a bus full of American volunteers is hijacked in a dangerous section of Morocco, the Fly Team works to locate the missing aid workers and the people who kidnapped them.

When the star witness in the case against Greg Csonka, the man responsible for the death of Wes' former partner, is beaten to death in a Budapest prison before he can testify, the Fly Team attempts to salvage the case to secure Csonka's conviction. As they dive back into the investigation, Mitchell is forced to confront the pain of losing his partner. Meanwhile, Wes assists Booth with preparing for his promotion interviews.