Dogs: Bullets & Carnage

sometime in the future, somewhere in europe a city has many levels of underground, even secret dangerous levels that have answers to the past. mihai is a retired assassin who has returned home to settle a vendetta and start a new life as a restaurant owner. haine was genetically experimented on as a child, which led to him possesing dog like attributes. badou is his clumsy chain smoking partner who becomes deranged when denied cigarettes. naoto was orphaned as a child and has amnesia she was trained to wield the sword. their pasts are somehow connected to the secret underground and the organization that controls it.