芝加哥警探安·劳森（由塞缪尔·L·杰克逊饰演）与苏格兰侦探博伊德（由文森特·卡塞尔饰演）合作，追捕一名残忍的连环杀手。五年前，劳森曾调查过一系列具有相同恐怖模式的杀人案件，而现在这名施虐的杀手在苏格兰重新出现，恐慌的当地…

After witnessing a murder, a young single mother is forced to act as a witness. Threatened on all sides, she must do whatever it takes to protect her son.