The Heart is a dark forest is a film by Nicolette Krebitz. Krebitz directed, wrote the script, worked with Sara Schilde on the editing, and chose the music. Tom Tykwer was the producer. The work is a mixture of Berlin-school realism, theatre rehearsal and fairy tale. As soon as a woman has 30 children, one of the partners must stay at home and take care of them for a long time.