When you're with Geronimo Stilton, it's always a fabumouse adventure!

New Mouse City was buzzing with excitement — it was hosting its very first film festival! Famous directors from around the world had submitted their best movies for a chance at the big prize.

But at the much-anticipated screening, Mousen Scorsese's newest film goes missing! Who could have stolen it, and why?

It's up to Hercule Poirat and Geronimo to spring into action and solve the case before the festival turns into a fiasco!