「待ちかねたぞ！
　厄介な事件が俺たちを呼んでいる！！」

時は大正、世は泰平―――
名探偵の春先旅行に居合わせたのは、いつも事件現場で出くわす駆け出し書生としかめっ面の堅物将校。

三人寄らば三面出来役猪鹿蝶。
いつでもどこでも奇々怪々な事件アリ。

"Finally! There's a troubling case calling our names!"

The time is Japan's Taisho Period, and the world is at peace...
During his spring vacation, the great detective runs into a prudish officer with a scowl and a fledgling student who seems to always show up at crime scenes.

The three of them together makes the three stooges. The three amigos.
Strange cases are sure to follow whenever they are together.