The members of a Vietnam veteran's old Army unit start turning up murdered. The police soon begin to suspect that he is in fact the killer. He knows he isn't, and must find the real killer in order to clear his name. He soon realizes, however, that the real killer is now hunting him. The man is an official from Southern Vietnam who has come to the US to take revenge on those who he thinks have betrayed him as they left him alone in the jungle during a surprise attack.