故事发生在第二次世界大战中，由于无线电通信已经不安全，所以英国军方开始训练军鸽，利用他们来和法国地下抵抗组织和盟军进行通讯。野鸽子“勇士”看到这么多同类为国出力，也跃跃欲试。于是，“勇士”想尽办法混到了军鸽中，未经过训练的“勇士”和其他军鸽相比显得有些力不从心。但事有凑巧，“勇士”接到二战中最严峻的任务，把诺曼底登陆的情报送到盟军手中。面对敌军凶狠的军用猎隼，“勇士”能否顺利完成任务？...

Inspired by the true events of the infamous 1983 prison breakout of 38 IRA prisoners from HMP, which was to become the biggest prison escape in Europe since World War II....