 The medical student Eve is assigned to care of Don Wake, a catatonic patient of a psychiatric Cape State Hospital who was found covered with blood near his dead mother. She must succeed in disclosing the truth about the murder of his mother and improve his conditions to conclude her medical course. She secretly changes his medications and he starts talking to her about a theory of conspiracy leaded by the mysterious Malachi. Eve becomes obsessed and paranoid with her patient while Don dominates her mind deeper and deeper. When she breaks with Don out of the mental institution, she finally discloses the truth about the crime.