Set in 1115, this prequel to Mouse Guard: Fall 1152 fulfills the promise the wise oldfur Celanawe made to Lieam the day his paw first touched the Black Axe: to tell the young warrior about the mouse who first wielded the deadly weapon. The arrival of distant kin takes Celanawe on an adventure that will carry him across the sea to uncharted waters and lands, all while unraveling the legend of Farrer, the blacksmith who forged the mythic Black Axe.