Yes, it's called nightmare arrival. This is the translated name, which was put on HBO. I have seen most of it. Probably because she didn't think her sister was dead, and then one of her relatives died. When she went to the funeral, she met her sister's husband (John temporarily) and became good friends with John's daughter (Amy). His daughter is a strange girl who always believes that there are evil things in the world. Later, she lived with John in a mansion (where she used to live), where a series of things happened. She had nightmares and continued to investigate her sister. Later I learned that the nurse who took care of my sister had something to do with John, so I suspected that John and the nurse had killed her together. She went to her sister's grave to knock on the coffin and found that it was not her sister's body. When John found out, he began to chase her and tried to kill her. In the process of escape, Christine (the heroine, I don't know what the translation is) killed John (it seems that she killed him, but she forgot it after a long time). Later, she met a ferocious monster and began to run away desperately, but she was still caught. The monster saw that she was wearing a necklace around her neck and let her go. Only then did she know that the burned person was her sister. John killed the nurse and asked her to replace her sister's body. Just when the two sisters met, Amy suddenly killed her sister from behind. Amy didn't know it was her mother and thought it was a monster. Finally, her sister was cremated. Christine poured the ashes into the river and Amy took a picture. The last photo is her sister's appearance, and the play is over.