A group of students from the Medical Academy goes on a volunteer mission to a children's psychiatric clinic located outside the city. During the day, this place is a peaceful abode for children suffering from various mental disorders. But everything changes when darkness falls. From now on, the entire territory of the hospital is their prison. Your deepest fears begin to come to life. Every decision leads to dire consequences. They have until dawn to unravel all the mysteries and save themselves. The next eleven hours will change their lives forever...