根据同名小说改编。男歌手偶然与从未见过面的自闭症儿子相遇，一个义大利父亲，一个自闭症孩子，一台哈雷机车，一趟拥抱惊喜的公路之旅。

There isn't much crime in Stoneleigh, Massachusetts, a college town, a mountain getaway for the quietly rich. So when Edward Inman, owner of Stoneleigh Sentinel security, gets a late-night alarm from the home of one of his wealthiest clients, Doyle Cutler, he does a routine check and thinks nothing more of it—until a local student claims that she was sexually assaulted that night at Cutler’s house.
Edward soon finds himself drawn into the girl's story, and his investigation leads him to his old girlfriend, whose teenage son may know the truth about what happened that night. Security is a timely, wry, and riveting story of adults and children, secret lives and civic culture, suspicion and sexual hysteria.

1975年，罗马知名天主教男子高中的三名学生犯下骇人罪行，在同学和整个社区中引发轰动。