Set in a world where mercenary groups (or "bands") are akin to rock stars and rock bands, Clay "Slowhand" Cooper (nicknamed as such due to commonly getting hit first in every fight) lives a quiet life in Coverdale as a watchman with his wife, Ginny, and his young daughter Tally (short for Talia). One day he finds his former bandmate and best friend Gabriel on his doorstep, and Gabriel tells him he came to get Clay's help in getting their former band, Saga, back together in order to rescue Gabe's daughter Rose, who joined a band and is now trapped in Castia, a faraway city surrounded by monsters and about to be besieged. While Clay initially refuses to accompany Gabriel, Tally convinces him to go.
