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?
This mansion cost two billion yen!
Die Villa hat zwei Milliarden Yen gekostet!
¡Esta mansión estaba 
valorada en 20 millones!
¡Pero si la mansión estaba 
valorada en veinte millones!
Mon manoir
a coûté deux milliards !
Esta mansão custava
dois bilhões de ienes!