
In "Bungo Stray Dogs: Dead Apple," a devastating catastrophe is sweeping the globe, causing widespread panic and confusion. A mysterious fog envelops the planet, and soon after, ability users—individuals endowed with supernatural powers—are found dead under suspicious circumstances, with many cases appearing as suicides. The Armed Detective Agency steps in to unravel the truth behind these eerie incidents, determined to protect both the city of Yokohama and the world's ability users from the unknown threat.
As the investigation unfolds, the Agency encounters a shadowy figure known only as "Collector," an enigmatic ability user who seems to be orchestrating the widespread chaos. This antagonist’s true motives and powers remain shrouded in mystery, making him a formidable enemy to confront. The stakes are raised as the team delves deeper into the case, discovering that the catastrophe might be part of a larger, sinister plan that threatens to upend the delicate balance between ability users and ordinary humans.
Faced with unprecedented danger, the Armed Detective Agency finds itself forming an unlikely alliance with their historic rivals, the dangerous Port Mafia. Trust and courage become essential as both sides put aside their differences to combat the looming threat posed by Collector. Together, they embark on a tense and gripping mission to save Yokohama and ability users worldwide from being consumed by the fog’s deadly grip, testing their bonds and resolve in the process.