影片改编自英国作家路易斯·德·伯尼尔斯《战地情人》的畅销书，讲述了名叫Koko的小狗穿越澳大利亚寻找曾经的主人的真实感人故事。 影片中的红犬，由一只两岁大的叫做Koko卡尔比犬扮演。这种犬据称是柯利犬的后代，目前在澳大利亚的分布极其广泛。 在澳大利亚西北部的一个铁矿上， 有一只叫Red的红犬。在美国青年约翰（乔什·卢卡斯 Josh Lucas 饰）一次救了它之后，就把约翰做了自己的主人。约翰爱上了矿上的秘书（瑞切尔·泰勒 Rachael Taylor 饰）。但在订婚之后的第二天的早上，约翰在上班的路上撞死了一只袋鼠，导致摩托车翻车自己当场丧命。从后，Red走遍了澳大利亚，甚至搭乘轮渡东至日本，去寻找自己的主人……
Lewis returns to Oxford after several years absence and is reluctantly assigned by his new boss, DCS Innocent, to the murder of an Oxford mathematics student who was shot while participating in a sleep study. The key-code used to access the sleep lab was assigned to a fellow maths student, Daniel Griffin, but Daniel's math tutor has provided him with an alibi. Daniel is a maladjusted young man who will soon inherit his father's automotive empire. He is disruptive and has no respect for his uncle who now heads the company. The future of the company however rests on an impending deal with Japanese investors who insist that family unity is all important at this time. When two other murder occurs, Lewis must decipher a cryptic clue left in an old case file by his former boss, Chief Inspector Morse.
