What was it about? -뭐에 관한 영화였는데?

What did you do last night?

I saw a movie.

Did you find it interesting?

Yes, it was very exciting.

What was it about? >> 어떤 내용인데?

It was a story about a man in love with a whale.

It was very touching. You should watch it. >>매우 감동적이었어

Thanks. I might watch it this weekend.