In the giant clockwork city of Asselberg, the life of all things is dominated by the rhythm of a huge and precise gear core - the "Great Will". The order here is truth, and the disorder is heresy.
Linus, a humble gear tuner, is the only arrhythmist. He could hear the "whining" in the metal heart that no one could hear - it was a sign that the entire city was about to collapse.
When his warning is regarded as a lie that can overturn the world, and when the supreme Priest of Time lists him as public enemy number one, his only choice is to escape with Ella, a mysterious girl from the Forbidden City, into the mechanical maze that sustains everyone's life and is about to swallow everyone.
Is what they are looking for a way to save the city, or a horrific truth that has been concealed by order for hundreds of years?
In this city built of brass, steam and lies, when the hands of the clock point to the end, can one person's whisper shake the gears of the entire world?
