NCIS是NavalCriminalInvestigativeService的缩写，直译过来就是海军罪案调查处。这个隶属五角大楼的特别部门，专门从事与海军以及海军陆战队有关联的任何罪案调查。海军调查处被赋予了特殊的调查权，只要是案情需要，任何人都必须接受质询无论职务和军衔高低。NCIS小组每次都会遇到各式不同的案情，从谋杀、缉毒、谍报活动、到反恐行动、甚至是神秘宗教，无奇不有。N8-"Was it hard to get over?"-"One gets over the loss of a wallet,or a watch....But a loved one,they never leave you.You never get over,you only get through."N12-"What do you want?"-"I want whatever you want.Whatever you need.A friend to talk to,a shoulder to cry on."