Diary of a Mad Man is a darkly comic one-man drama tracing the psychological collapse of a corporate worker whose status craving mutates into obsession. Adapted from Nikolai Gogol and relocated to contemporary Ireland, the play immerses us inside a mind where professional failure breeds paranoia, rage and terrifying logic. Consumed by race, hierarchy and fixation on his CEO’s daughter, his inner voice grows seductive, persuasive and lethal. As reality fractures, the audience becomes trapped inside his reasoning, forced to confront how ambition corrodes identity and madness feels disturbingly justified, dark, funny and deeply unsettling.