Mezue ahịrịokwu na-esonụ: Na Belfast, Septemba 1983, n'etiti The Troubles, Sergeant Sean Duffy, otu n'ime ndị Katọlik ole na ole nọ na Royal Ulster Constabulary (RUC), ka a chụpụrụ na RUC na ebubo ụgha. N'otu oge ahụ, Dermot McCann, onye na-atụ bọmbụ nke IRA na onye gara akwụkwọ Duffy na-agbapụ n'ụlọ mkpọrọ Maze wee bụrụ onye isi ndị British Intelligence. MI5 kpọpụtara Duffy site na ezumike mmanya ya iji chọta McCann. Akwụkwọ akụkọ ahụ na-esote mbọ Duffy na-agba iji dozie ogbugbu a na-emechi ọnụ ụlọ iji nweta ozi dị n'ime banyere ebe McCann nọ, nke na-eduga na
mgbalị igbu onye praịm minista Britain bụ Margaret Thatcher na Brighton.