An estranged brother and sister reunite at their father's funeral and make a spur of the moment decision to fulfill their childhood dream of driving across Mexico on their old motorbikes...

　　故事讲述彼得·威廉姆斯神父的他被一个他试图驱除的恶魔附身，最终犯下了最可怕的亵渎罪，18年后，他的罪的后果将再次困扰他，展开与内心邪恶最伟大的斗争...