A small group of everyday passengers on a speeding London commuter train battle their warped driver who has a dark plan for everyone on-board.

A young woman is held captive by an unhinged lunatic intent on transforming her into his latest blood-splattered masterpiece.

Can Dethklok choose between their egos and the greater good of the world to embark on a gauntlet of dangers that will try their very souls and finally write the song that will be their salvation?