This work is the last play by Sarah Kane, the controversial contemporary British playwright, who died aged 28 in February 1999. A single voice, dragged through therapy and endless medication, reveals the true experience of clinical depression.

4.48 Psychosis was written throughout the autumn and winter of 1998-99 as Kane battled with one of her recurrent bouts of depression. On February 20, 1999, aged 28, the playwright committed suicide. On the page, the piece looks like a poem. No characters are named, and even their number is unspecified. It could be a journey through one person's mind, or an interview between a doctor and his patient.