When 10-year old Olivia's Mom goes on a business trip for the weekend, she leaves Olivia home alone with her 17-year-old brother Miles in charge. The first night, Olivia falls asleep on the couch, and wakes up, not realizing how late it is. She walks her dog Charlie without Miles knowing, and witnesses a young woman being kidnapped on the empty New York City streets. Olivia runs home and tells Miles, but he doesn't believe her. The next morning, she explains what happened to local cops, and they don't believe her either! Only a cynical female detective named Dottie (played by Academy Award winner Susan Sarandon) listens to Olivia, but she too is skeptical. Undaunted, Olivia bravely launches her own investigation, putting herself into perilous situations. Her can-do spirit ignites one extraordinary adventure after another. Can she outwit the bad guys and convince her brother and Dottie of the truth in time to save the day
克里斯蒂安·沃尔夫（本·阿弗莱克 Ben Affleck 饰）具有破解复杂难题的天赋。当一位旧识惨遭谋杀，并留下一条“去找会计师”的神秘讯息后，沃尔夫不得不开始追查此案。当他发现得用更极端手段时，沃尔夫找了他久未连络、同时是名顶尖杀手的弟弟布莱斯顿（乔·博恩瑟 Jon Bernthal 饰）合作。兄弟俩与美国财政部副局长玛莉贝丝·麦迪纳（辛希亚·阿戴-罗宾森 Cynthia Addai-Robinson 饰）联手，一起揭露这桩致命阴谋，却让他们成为冷血杀手集团的目标，这群杀手无所不用其极也要掩盖秘密。
