Gustave has taken it upon himself to observe Marion and Sanglain following the death of the Princess and DT.   But KT thinks Gustave is in the city of Marquesas for other reasons. 
Beginning the investigation to 
find out where Charlie went.
Empezando la investigación para 
encontrar a dónde ha ido Charlie.
Empezando la investigación para descubrir a dónde ha ido Charlie.
Iniciando investigação para
descobrir onde Charlie foi.