《小特工蒂姆》讲述了蒂姆和家人在海边一个古老的旅馆里度假的故事。蒂姆在他新家里很难生活，直到他遇到了西蒙。西蒙1973年被冻住，现在醒来后却很难适应一切改变。作为一名曾经的间谍，西蒙需要去处理一个犯罪案子，蒂姆确定帮助西蒙一起开始这场冒险。

A hardened criminal fresh out of the joint takes a job as a handyman in a dilapidated house; but the twisted horrors he finds inside are enough to send anyone running. So why does he stay? And why are so many people drawn to Penance Lane?