Charlie and Nick both receive a threatening text that sends Nick on an investigation to find the source once and for all. Charlie flashes back to her first interactions with Fatah on Midnight City. Meanwhile, President Payton's rival Senator Green reveals just enough about the upcoming senatorial convoy attack report to cause her to question Charlie's faithfulness. Charlie and team have to employ Jack Dawkins to contain a smallpox contamination in Panama while avoiding detection in the country. Kurt continues to pine for Maureen but an unexpected kindness distracts her from his attentions.

Charlie and Maureen accompany President Payton to Qatar on a diplomatic trip. What begins as a standard mission of diplomacy becomes a disaster when a Qatar national infiltrates the American embassy claiming to be CIA. Constance tasks Charlie to find out if he's telling the truth. Meanwhile Lucas, Dash and Kurt work to track down Al Moosari, believed to be a direct link to Omar Fatah. Kurt has a run-in with a walk-in who claims to have found a valuable 'backdoor' into highly valuable communications. Nick, still MIA, is violently interrogated by a masked man. Charlie finally takes desperate and dangerous measures to remember the events of the convoy attack.