Fugu, or pufferfish, is a delicacy but can be fatal if not prepared properly. When a shogun's agent is murdered, fugu poisoning is suspected—and Usagi's friend, a fish merchant, is the primary suspect, as he prepared the deadly dish! Will Usagi and Inspector Ishida clear him of suspected wrongdoing, or will they find the evidence to convict him?

* New self-contained issue!