A girl named Mahtab is sexually assaulted and abandoned by her boyfriend Nima. To prove her legitimacy, she decides to take a horrible action in the inn opposite Nima’s house. Mahtab sees a little girl named Nazanin in Nima’s apartment. One day, after returning from school, Nazanin realizes that she has left her key. Nazanin has to enter Nima’s house to call her father, where she gets involved in the story of Nima and Mahtab, and somethings happen to her.