Eight centuries ago, Kalimyne the Calamity, an alchemic being of immense power and insanity, was defeated and sealed away.

It had taken a war that spanned a decade and cost thousands of lives. These days, a revolution of technology has changed the face of war as well as daily life. Clockwork, Steam, and Magic compete to be the prime lifeblood of human society.

London Gearmesher follows the philosophy of the Clocksmith, creating devices of both domestic and violent purpose.

As she enters into adulthood, London finds herself striving to leave apprenticeship, but even her own family history stand in her way. What is this history? Will it spell hope or calamity as the ancient seal begins to crack?