香港警队存在一个神秘部门“第七行动组”，专门调查科学不能解释之神秘案件，绝不向外宣称其存在。一件一件的灵异事件发生后，不禁质疑世上是否存在一些科学解释不了的事。一个实干警探，一个疯癫的精神病茅山师父，两人迸发出火花，共同调查香港人耳熟能详的都市传说……
Scott’s life is in freefall: his girlfriend has just left him, he’s dropped out of studying medicine and he’s desperate for cash to help save his brother. Out of the blue his terminally ill neighbour comes to him for a favour – to help him commit suicide. Scott reluctantly agrees, and in the process, he and his two friends decide to set up their own illicit assisted-suicide bus...
