Detective and art lover Adrienne Sandford considers herself lucky for finally boarding a train to Italy after years toiling away in London, - until a passenger is found stabbed to death in their cabin. As the train crosses the Alps and murders multiply, she must apply all her wits to make it safely to Rome.

100 crime-related scenarios to solve as you take on the role of detective in a railway journey across the Alps from France into Italy. Solve the individual puzzles to piece together the events that led to the ghastly events.