There are around 2.5 million people with borderline personality disorder in Germany alone. This personality disorder has a significant impact on family and friends. Those with borderline disorder are erratic, impulsive, and often turn everything upside down in a matter of seconds: they end relationships without compromise or drop out of training programs. On the other hand, they fascinate with a special charm and exceptional empathy. This makes it difficult for their loved ones to set necessary boundaries. They allow themselves to be manipulated and pressured, repeatedly helping the affected person out of self-inflicted crises and feeling responsible. Because people with borderline personality disorder are radical—even when it comes to causing harm to others or themselves. Cosmo is a borderline individual. He experiments with drugs, refuses to eat, injures himself and others with razor blades and burning cigarettes.