Fourteen years ago, Swillow the wolf got betrayed by her own brother. She was saved by a wolf named Citrus Snow, and now she walked the world as the "Slaughterhound", a beast known for her massive strength, and unknown magical abilities.

She returns to her old town during a hyena invasion to loot the land, only for Citrus Snow to finally reveal her boyfriend is none other than the brother who turned on her. Deciding to submit to her leader, Swillow ends up having to question how much her sibling has changed, and if she can change with him, while they deal with a war between a mustelid species known as crimsons, hyena clans who want war, and the insanely patriotic canine kingdom, Canida.