A guy named Malo Monestier is 15 years old. He has to move with his parents and younger sister Zhanna from noisy Paris to a godforsaken outback. Now they will all live in a spacious house of their own, overlooking the forest. But something is wrong with this house. The house under the pine trees seems to be watching Malo. Zhanna screams at night and talks about a new friend named Polina. But neither in the House under the Pines, nor for many kilometers around there is any Polina, they are alone here. Then Malo decides to find out what is going on. And he unearths a terrible story that 30 years ago in this very house a girl named... Polina disappeared without a trace! What if Polina's ghost asks for help? What if she didn't just get lost in the forest?