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. 
No, I'm going to look for 
the man I lost yesterday.
No, voy a buscar al hombre que perdí ayer.
No, voy a buscar al hombre que perdí ayer.
Não, vou procurar pelo homem
que perdi o rastro ontem.