As any well weathered traveler will tell you, it’s usually best to abide by the rules of the places you find yourself in. But when the first rule is that no one still alive should be there, abandoning all hope may be the least of your concerns.
When eleven year old Millie finds herself stepping through the dark and onto a strange looking train, there’s not an awful lot she can do. Without her parents and the comfort of familiar surroundings, Millie is left to ask strangers for help. But the other passengers are silent and sorrowful, looking anywhere but at her – and they won’t tell her the name of the next stop . . .
Note: Underground contains some graphic violence and harsh language.