Divorced father Thomas Hacklin discovers, on visiting his children, that his ex-wife's residence has been abandoned; he is unable to locate or contact them. He is mystified after approaching the authorities, who refuse to assist, but speculates when he becomes aware that her new husband is in the United States Federal Witness Protection Program. As he makes inroads into finding their location, the police and authorities make it more difficult for him to make contact. He becomes determined upon discovering the government advised the low-tier mobster new husband to marry his ex-wife, in order to disqualify her from testifying against him in the eventuality of a trial for his criminal activities. The mob follows Hacklin's actions for their own purposes.