Four years after taking over the dojo when her father passed away, Kaoru's well-ordered life is disrupted by a number of unexpected changes. Between dealing with her childhood friend's past, her surrogate mentor leaving, and a scheming CEO, Kaoru will find out exactly what she's made of.

Sequel to Defender. Despite Kenshin's promise that his wandering days are over, his prolonged disappearance worries Kaoru. When rumors spread of the resurrected Hitokiri Battousai joining a rebel group, Kaoru will risk her job, her relationship with her master, and even her life to uncover the truth of what happened to the man she's falling in love with.