"Smokin' Parade" is a dark fantasy manga series set in a dystopian world where humanity coexists with monstrous entities known as "Jack the Rippers." These creatures, born from human corpses, possess immense power and are capable of causing widespread destruction. To combat this threat, the government establishes the Special Forces Unit, an organization tasked with hunting down and eliminating Jack the Rippers. The story primarily revolves around the members of this unit, particularly their struggles, motivations, and the moral ambiguities they face in their mission.

The protagonist, Shiki Wakizaka, is a former soldier who joins the Special Forces Unit after a tragic incident involving his younger sister, Mutsuki. Mutsuki, who was transformed into a Jack the Ripper, becomes a central figure in the narrative, as Shiki grapples with his desire to save her while fulfilling his duty to eradicate these creatures. Shiki's internal conflict is a driving force in the story, highlighting themes of loyalty, sacrifice, and the blurred lines between humanity and monstrosity.

The Special Forces Unit is composed of individuals with unique abilities and tragic pasts, each contributing to the group's dynamic. Among them is Kyouko Kujou, a skilled fighter with a stoic demeanor, and Shouta Narukami, a former detective whose investigative skills prove invaluable. The unit operates under the leadership of the enigmatic and ruthless Commander, whose methods often raise ethical questions. As the story progresses, the unit faces increasingly dangerous Jack the Rippers, uncovering secrets about their origins and the government's true intentions.

The narrative delves into the origins of the Jack the Rippers, revealing that they are not merely mindless monsters but beings with complex emotions and memories from their human lives. This revelation adds depth to the conflict, as the characters are forced to confront the humanity within their enemies. The series also explores the societal impact of the Jack the Rippers, depicting a world where fear and paranoia have led to widespread oppression and moral decay.

"Smokin' Parade" combines action-packed sequences with psychological drama, creating a tense and engaging storyline. The characters' personal journeys are intricately woven into the larger plot, providing a balance between individual development and overarching narrative progression. The series maintains a consistent tone of suspense and intrigue, keeping readers invested in the unfolding mysteries and the fates of its characters.