Fragile: Farewell Ruins of the Moon is set in a post-apocalyptic near future world that has lost its light and is covered in a dense fog. Almost all the world's population has vanished, and the cities have been left abandoned. The game places the player in the shoes of Seto, a young boy.
Seto wanders the world, searching for survivors and the answers behind the disappearance of everyone else. Seto also searches for a mysterious girl named "Heroine"; what her role is in the game is unknown. However in his quest he must deal with ghosts and demons that lurk within the ruins of the abandoned cities. Despite this, the producer of the game insists that Fragile is not a survival horror in the same vein as Silent Hill, rather it will focus on "human drama".
The world of Fragile will be filled with wall sketches and short stories for the player to examine and read. A competition will be held where readers of gaming magazines can send in their own sketches and short stories to be included in the game.
The Wii Remote is used as an aid in exploration. Seto has access to a flashlight, controlled by the Wii Remote, to illuminate his surroundings as well to solve puzzles and to interact with the environment. Seto also has a metal detector that the player can also operate using the Wii Remote; this is used to find various items hidden on the ground.
Seto is able to use the flashlight to uncover ghosts, though the means of fighting these ghosts is currently unknown. In released screen shots Seto is seen holding a simple twig, though its use is also currently unknown.
The Moon is thought to play a large role in the game.
