Lucía, Lucía 2003 one on netflix

Lucia, an children’s book author, tells the story of her husband’s disappearance. One day on their way to Brazil he just disappears. She goes to the police, gets a ransom note, and makes friends with the old dude downstairs and the young dude upstairs as she tries to find him. Things take a bit of a twist as she realized the kidnapping may not be as simple as it seems on the surface.