What for?

Céleste Noménoé, a provincial actor, comes to Paris for an inheritance. He also gets a part in a movie. The managers of a music-hall notice him. He takes the stage name of Grock.

Lackered Box

The story gets under way at a weekend house party where a scientist is murdered and his secret papers stolen. Putting his "little grey cells" in action, Belgian detective Hercule Poirot methodically pieces together the clues, revealing the culprit to be -- you guessed it -- the Least Likely Suspect.