Inspired by Sir Arthur Conan Doyle's classic literary characters, the series follows Dr. Wato-san Tachibana and Sara Shelly "Sherlock" Futaba, an eccentric police consultant who uses deduction to solve strange cases in modern-day Japan.

Ichiko lived in a big city, but goes back to her small hometown Komori, located on a mountain in the Tohoku region. She is self-sufficient. Ichiko gains energy living among nature and eating foods she makes from seasonal ingredients.