While in the hospital, Kate gets a call on her cellphone from Doctor Varava (Karel Roden) at the Saarne Institute. He recognized Esther from the photo Kate sent. Turns out that Esther is really Leena Klammer, a 33-year-old woman with a pituitary disorder that makes her look smaller and younger than her actual age. Leena was one of their most violent patients and escaped from the Institute a year ago. When Varava learns that Esther is home with Kate's husband, he advises her to call the police and to get her family out of the house. Knowing that John won't believe her, Kate races home through a snowstorm to warn him. Meanwhile, having been rebuffed by John, Esther trashes her room. When John hears the noise, he looks in her room, but Esther is not there. However, in the dim light of the fish tank, he notices Esther's paintings for what they really are—images of violence visible only under black light. Suddenly, all the power goes off. After checking the electrical panel, John continues to search for Esther. She suddenly comes from nowhere and begins stabbing him. Esther, looking now like the 33-year-old she really is, looks up the stairs to see Max watching her. Max hides while Esther grabs the gun from the safe and goes looking for her. Kate makes it home and sees John lying in a pool of blood. She goes looking for Max, but Esther shoots her in the shoulder. Kate hides in the bathroom and eases herself through the window out onto the greenhouse roof. Through the glass panels, she can see Max hiding among the plants. Kate signs to Max to continue hiding, but when Esther enters the greenhouse with the gun, Kate crashes through the greenhouse roof, landing on Esther and knocking her out. Kate takes the gun out of Esther's hand and carries Max outside just as the police start to arrive. Suddenly, Esther attacks Kate and attempts to stab her with a knife. They slide down a hill and land on the ice-covered pond. Esther continues to slash at Kate, so Max picks up the gun (dropped by Kate) and tries to shoot Esther, hitting the ice instead. The ice begins to crack, plunging both Kate and Esther into the water. Kate fights to reach the surface and climb out, but Esther pulls her back into the water, stabbing her again in the process. Kate punches Esther, knocking her out long enough to pull herself from the water, but Esther grabs her leg and tries to pull her back in while pleading, "Please don't let me die, Mommy." Kate replies, "I'm not your fucking Mommy!" Giving Esther a swift kick, she breaks Esther's neck, and Esther slides back into the water. In the final scene, Kate and Max climb back up the hill where they are met by the police.