Oliver Turner moves to St. Louis and quickly finds himself indebted to and employed by Sir Nightwatch.

Nightwatch is a small group solving all manner of cases involving magic and monsters from the shadows. Oliver finds himself under the watchful eye of Donald "Dodger" Rogers who was trained by Sir Nightwatch himself.

Together they compete with Eliza Alcius, an Arch Knight of The Celestial Order and her partner Basal Knight Amelia Petrochilos. Both groups fight for the protection of the weak but have very different methods but will have to work together if they are to stop a string of arsons threatening to throw St. Louis into chaos.