Rabbit ronin Usagi and the bounty hunter Gen rescue a young girl without realizing it, only to find themselves the target of her captors, in this first part of a new story!

Traveling through the countryside together, Usagi and Gen cross paths with another intriguing wanderer: a female gambler nicknamed "The Whip," who journeys across the land with a unique and mysterious mission. When The Whip meets a young girl at a gambling den who was sold into slavery by her destitute father, she determines to set the girl free. Unable to buy the girl from her owner, The Whip kidnaps her. The next morning, Usagi and Gen awake to a surprise-the girl has been left in their care, and they're surrounded by irate gamblers thirsty for blood!