Roch Maher is a guest of honour at his own funeral. It's emotional and strangely cathartic, but should he be there? Roch has motor-neurone disease and the end is near, but he is struggling to cope. Inspired by a visit to Indonesia, where families process their grief by living with the dead body of their loved one, can artist Grayson Perry help Roch face his fears to have a good death?