Summary pulled directly from Steam - Some text may only be applicable to Steam platform

Can't get enough of Little Nightmares? Unveil all the secrets of The Maw in a parallel escape story where you play as the Runaway Kid, another prisoner looking for a way out of this place of misfortune. On his journey, The Kid will explore The Depths, The Hideway and another hidden part of The Maw offering a different perspective on Six’s adventures as well as new challenges to overcome. Get Little Nightmares™ Secrets of The Maw and enjoy these additional stories as they become available to download. If you purchase Little Nightmares™ Secrets of The Maw, all future content that is part of this pass will be accessible in-game once it is available.