A phantom thief named Rusty Nail sends a letter to a mansion, saying they're going to steal their treasure. The Mikuni Detective Agency is called to protect the treasure, but are they up to this challenge?
We were only hired to 
protect the treasure.
Sie haben uns nur angestellt,
 um den Schatz zu bewachen.
A nosotros solo nos encomendaron 
proteger el tesoro.
Nuestra misión era proteger el tesoro.
Nous n’étions engagés
que pour protéger la statue.
Nós fomos contratados só
para proteger o tesouro.