The detectives are asked to take care of a cursed medal that brings misfortune upon its owner. Will they be able to survive the series of misfortune that falls upon them?
So that's what they mean by "shooting 
up like bamboo shoots after the rain!"
Wie beim entsprechenden Sprichwort!
Así que después de la lluvia, 
salen los brotes de bambú.
Así que salen brotes de 
bambú después de llover.
Então é isso que "Subir como brotos de
bambu depois da chuva." quer dizer!