Audiences fall for arresting whodunit

The female protagonist, Sandra, is portrayed by German actress Sandra Huller, while the husband, Samuel, is portrayed by French actor Samuel Theis.

Triet explains that there were different reasons why the characters are named after the actors.

While watching Huller in the German movie Toni Erdmann, a comedy about a practical joker father and his hardworking daughter, Triet was captivated by Huller's natural and realistic acting skills and had a strong wish to collaborate with her.

So, the director took a sort of strategic approach by using the actress' name for her character, believing it might increase the chances of convincing Huller to join the cast.

"Sometimes the actors and actresses might exaggerate the suspense a bit in genre movies, but Huller shows no such sign of that in her performance. She adopts an almost documentary-like approach to portray her character," says Triet.