Satoko dreams of marrying a noble but can't escape the assassin who has her within his sights. nAfflicted with a heart condition, Meiji-era noblewoman Satoko is determined to secure a marriage that will benefit her family before she dies. But before she can realize her goal, she's targeted by a mysterious assassin named Shinpei. In a last-ditch effort to save her life, Satoko asks her would-be murderer to marry her.

Her proposal isn't sincere, but unfortunately for her, Shinpei loves as intensely as he kills. Can Satoko find a way to break the engagement without losing her life? n nKotaro scales a steep cliff with Satoko in his arms. Unfortunately for him, Shinpei is waiting at the top, his eyes burning with hatred.

The battle between these two men vying for the same woman's heart will finally reach its bittersweet conclusion. Meanwhile, Satoko realizes she's in love with Shinpei. Before she can come to terms with her feelings, however, she receives a shocking new order!n