what it's about
Soñé con un pájaro, ¿de qué se trata, general?
I dreamt about a bird, what does that mean, general?
— Khrustalyov, mi coche! (1999)
Porque quiero de qué se trata todo esto.
Because I want to know what this is all about.
— El hombre de la Tierra (2007)
I know what it's about.
I think I know what this is about.
Vas a tener que decirme de qué se trata.
You're going to have to tell me what it's about.
— Mother Night (1996)
I wonder what it's about.