Urgent: Introduction to Dancer in the Dark, about 300 words.

Dancer in the Dark is one of the classic works of Danish director Lars von Trier, which tells the story of a Czech immigrant mother who came to Washington State with her son and lived a hard life alone. Thelma, the heroine, is a woman with great musical talent and loves drama performance. However, the trick of fate made her born with poor eyesight. More unfortunately, she found that her son also inherited the disease. With little income, she has been saving money for her son's operation, trying not to let him know about her illness, fearing that anxiety will reduce the success rate of her son's operation ... Her landlord Bill is a policeman, but he has a profligate wife. When Bill found that his property was about to disappear, he accidentally found Salma's small box of money and stole her savings without hesitation. Selma questioned Bill after learning about it, begging him to return the money to her, but she accidentally injured Bill in the quarrel. At Bill's request, she shot and killed him ... The court sentenced her to death, and her love for her son and despair of life made her give up hiring a private lawyer with her savings. However, in the face of death, she finally sang the swan song of life, and everyone shed tears.