Juliane goes home agonizing over her inability to communicate with her sister and see how she is doing. Her boyfriend suggests that she writes to her sister telling her how she feels. The film goes into a flashback of their childhood where we see the closeness of the sisters. Juliane mails the letter and soon after is able to visit her sister. They argue often but Juliane continues to visit her sister. Following a bad argument when Marianne slaps her sister, Marianne is moved to a maximum-security prison where the two are separated by a pane of glass and must communicate through an intercom.