Chaika Trabant, a coffin-carrying young sorceress, tracks down the scattered remains of her late father, the deposed emperor Arthur Gaz. She recruits Tooru Acura, an idle ex-saboteur with nothing left to fight for since the war's end, and his sister Akari to protect her on the road, where rival factions and old soldiers have their own reasons to intercept her. This is the original light novel behind the manga and both Hitsugi no Chaika anime seasons.