Since the death of the Mifune Lord during the civil wars at the turn of the 16th century Japanese, Miyamoto Usagi is a samurai without master. Completing the warrior's pilgrimage, he wanders across the country in search of harmony, perfecting his martial and spiritual qualities while fighting injustice. Usagi will find the popular Inspector Ishida to solve a double murder in a hostel, will help an allied clan to preserve his honour, and will discover that the manufacture, and sale, of soy sauce can prove as deadly as it is delicious.