First premiered in 2002, 4.48 Psychosis is the second Kane play produced by Warsaw's Rozmaitości Theatre (in collaboration with the Poznań-based Polski Theatre), after Cleansed. The last play written by Sarah Kane before she committed suicide is considered by some as her will, while others read it as a record of her mental illness. 4.48 Psychosis is the story of a young female patient of a mental institution who is led to suicide by her depression.