Shinobu Kocho, the Insect Hashira, embarks on a road trip to clear her mind and find inner peace after the events of the Demon Slayer Corps. She takes her trusty sword and her collection of specially bred insects with her as she travels across the country.

As she drives through different cities and towns, Shinobu encounters various people and demons along the way. She uses her Insect Breathing technique and poison to defeat any demons that threaten innocent people, but also takes the time to learn from the demons she encounters, hoping to gain a deeper understanding of their nature and motivations.

On her journey, Shinobu meets Ramon, a traveler who is also on a road trip to explore the country. Ramon is initially wary of Shinobu, but they eventually strike up a friendship as they share stories about their travels and experiences.