海伦开始接到一个小孩打来的电话，小孩自称是她的外甥迈克尔。但是，迈克尔15年前就去世了。当迈克尔打电话给海伦时，他痛骂了海伦的熟人，这些人后来在可疑的情况下死去。不久，海伦开始担心她是下一个受害者

When boredom, pride and a mad second of misjudgement leaves a hunter shot dead by one of five combat veterans also hunting in the Canadian hills, it is expected a police investigation will follow, but when the veterans discover the incident has not been reported, the leader of the team, Major Rex suspects the other party maybe plotting revenge. Convinced that he, his party, and their families will be targets themselves he decides to beat his suspected assailants at their own game, grouping together more army comrades and stocking up an arsenal of weapons for the forthcoming battle.

"To Catch a Killer" tells the true gruesome story of John Wayne Gacy - a good friend and helpful neighbour, a great child entertainer, a respectful businessman, and a violent serial killer who raped and murdered over 30 young boys.