在这部狗与警察片中,追寻着父亲的脚步，热血正义的青年早川勇作（市原隼人 饰）踏上了警察的道路。虽然还只是普通巡警，但他始终将刑侦一课作为奋斗目标，为此经常擅自追拿犯人，虽小有功劳，可是个人主义的毛病分外凸现。不久，早川接到调令，结果并没有如愿进入刑侦一课，而是来到了专门负责训练警备犬的警备部警备二课装备第四系。他终日跟随前辈水野夏希美（户田惠梨香 饰）学习训练装备犬的一切知识，心中满是愤慨与不满。而早川的搭档，则是此前被他救过的白化犬小白，“主仆二人”冥冥中有着相似落魄的命运。与此同时，连环爆炸案相继发生，在刑警一筹莫展的时刻，时常被警局冷落的警备犬部队得到展现自己实力的机会……
本片根据小森阳一的同名原著改编。
Hayakawa is a loose cannon as a cop, much to the annoyance of his department. One day after chasing a fleeing suspect who collides with a hurrying doctor during the arrest, Hayakawa helps the doctor to a patient about to deliver, only to find out it's a dog. The runt of litter is stillborn, but Hayakawa coaxes the little albino puppy back to life. Several months later Hayakawa is surprised by a transfer to the K-9 division, which he sees as punishment until the dog he's assigned turns out to be the German Shepard he once saved.
市原隼人就是日本的马景涛啊。结局几点疑惑。第一篇长评送闺女。要不是冲着户田我都看不下去了。原諒結局的種種BUG。汪星人和条子。
