Father Brown tries to transport a historically important cross to Rome engaging in battles of wits and faith with a thief and pursuing policeman. The thief, named Flambeau (Finch), is a master of disguise and is elusive, as Father Brown pursues him and tries to convince him to abandon his criminal career.　　During the making of the film, Alec Guinness was mistaken by a small boy for an actual priest. This episode appears to have played a part in Guinness's later conversion to Roman Catholicism.

其它主要演员：　　威廉 霍尔登 迈克尔 凯恩 索菲亚 罗兰　　基尔龙 穆尔 詹姆斯 海特 科林 戈登　　布赖恩 福布斯 奥斯卡 霍莫尔卡 特雷弗 霍华德　　此片为1958年拍摄于英国，全片采用黑白胶片

在生产钻石的南非，最近怪事连连，一大批未经切割的钻石失踪了，而且谋杀案频发。这些异常现象引起了英国当局的高度重视，于是007（肖恩?康纳利 饰）来到了南非。007以钻石批发商