Level-5 launched the first English trailer for their detective mystery title Layton’s Mystery Journey: Katrielle and the Millionaires’ Conspiracy, coming to iOS/Android worldwide and 3DS in Japan on July 20, with a 3DS release planned for the west this fall.

The trailer gives a preview of the English voice over as well as some of the game's story premise. Additionally, Professor Layton is mentioned and shown in the beginning scenes, but it's not confirmed if he will appear in the game's campaign.

There is also few scenes of puzzles that are shown in the trailer, the game is to be played vertically on the iOS/Android device screen.

The developer details the game’s premise:

The story will focus less on dynamic problem-solving and more on solving multiple mystery cases observed in the everyday lives of Londoners, which will bring a faster tempo and more comical tone to the series. It will be more familiar — and funnier — than ever, while maintaining an adventurous quality. The creators of the puzzles and brain-teasers, the core element of the series, will also be new.

You can watch the new trailer below: