TV producer Jimmy Fyffe starts taking anabolic steroids to restore the 'manliness' he has lost in a disastrous career and unhappy marriage. His plan works - a little too well. Soon he is a cocaine dealer, carving out a market in Dublin's more affluent suburbs. This draws him into conflict with two established drugs gangs. He is kidnapped, beaten and terrorized, and is linked to the killing of a drugs-lord and two Gardai. Testosterone, Dublin 8 describes the effect of the 'male hormone' on an individual, and the wider society, told against the backdrop of a gentrifying Dublin. It is a moral tale wrapped in a classic thriller that gets to the heart - and veins - of modern Ireland. Is Jimmy next to die, or will the same newfound machismo that landed him in trouble also help him escape it? Things get worse before they get better; ultimately, the answer is found in an ayahuasca ceremony in the Wicklow mountains.