Nate, a carefree young aspiring doctor, is going about his day to day life as usual when fate decides to come into play. Turned into a victim of an unexpected train crash, he wakes up in an overturned carriage to find that he is trapped in a blocked tunnel with no way to escape. Nate, and a few other survivors, must now try and battle their way out of this life consuming dungeon and wait until help arrives. But time is not on their side...