U.S Postal Inspectors are called in when a suburban couple are killed by a mail bomb. Suspicion immediately falls on the couple's estranged and heavily in debt son, who also just happens to be a Navy munitions expert. But investigations reveal that he is on the run from a past event in his life that is associated with the bombings. 　　译文(2): 当一对郊区夫妇被邮件炸弹炸死时，美国邮政检查员被召集过来。嫌疑立刻落在了这对夫妇分居且负债累累的儿子身上，而他恰好也是一名海军军火专家。但调查显示，他正在逃离他过去生活中与爆炸案有关的一件事。