Nikolaï, an abandoned baby, has been under foster care since birth. Despite a family willing to adopt him, the sixteen-year-old chooses to create his own home. He encounters Camille, a fascinating and witty fifteen-year-old, and proposes starting a family together. Confident in his ability to deal with any challenge, Nikolaï is determined to keep adults from interfering with his plans. Together, Camille and Nikolaï escape from their foster home and seek refuge in the depths of the dark forest. In this shadowy and enigmatic woodland, Nikolaï must confront his emotions and embrace adulthood. Gradually, he realizes that there are aspects of life beyond his control. This is the essence of the film "The Dark Heart of the Forest".