After loads of crimes solved by our favorite pony, Pinkie Pie, another crime is heard, but not like any others.

A Runaway Train, as they called it. Stole many passengers, with our two new recruits, Twilight Watson and Spike Holmes. But that's not all; this train is dropping it's temperature, and the Killer is on this train. Yet they only have the minutes before they dropped Ice Cold.

Now on the loose, and the train on full speed, they have only minutes to solve the puzzle, before the Killer gets away. Can they solve this dastardly puzzle before it's to late?