To be honest I almost didn't make it through the first episode. Decided to stick with it and ended up really liking it. I'm glad I didn't stop. The main character was my initial problem. She's a journalist for a newspaper and I don't think she smiled except maybe once or twice. She's got a horrific backstory so I forgave her. She gets involved in the story of a 5 year old girl who goes missing during a parade. The story is shown from her perspective along with the female detective that's working on the case. Also shown are the parents story as well as eventually the kidnapper. But the journalist is the real star here. She's tenacious in her fight to solve the mystery and sacrifices some of her own dignity along the way.
The story takes place in Spain with subtitles. There's nothing upbeat or with the slightest bit of humor, as it should be. But that means it's pretty gloomy throughout and seems very suited to the story. In the end, I thought it was very well done and they left it open for a new case.