The first episode of the fourth season of Bungo Stray Dogs takes us on a journey into the past to explore the origins of the Armed Detective Agency. The episode begins with a flashback showing Fukuzawa Yukichi as he declines an offer to work for the military police. On his way to his next assignment, he comes across a crime scene and a secretary trying to solve a murder case. Here, we meet the 14-year-old Edogawa Ranpo, who impresses everyone with his quick deductions and innate talent for uncovering the truth.

The story continues as Yukichi and Ranpo investigate a threat at a theater, where they speak with the lead actor and other performers. The episode highlights how Ranpo's unique perspective on the world and his ability to notice details that others miss make him an invaluable asset to their investigations.

This episode sets the stage for exploring the unknown origins of the detective agency and provides an intriguing glimpse into the backstories of some of the series' most beloved characters. The dynamic between the young Ranpo and Yukichi is captivating, giving the series a fresh twist while retaining the essence of what makes Bungo Stray Dogs so compelling.

The episode leaves the viewer in suspense and eager for more, as they want to learn about the founding of the Armed Detective Agency and how each character contributes to its success. With its unique blend of superhuman abilities, gripping mysteries, and rich character development, Bungo Stray Dogs Season 4 has gotten off to a solid start, promising to captivate and entertain fans throughout the season.