A gripping, dramatic thriller infused with a twist of dark humor, PU-239 reveals the lengths to which a man will go to secure his family's future. While working at a nuclear power plant in Russia, Timofey (Paddy Considine) is exposed to a deadly dose of radiation while trying to avert a plant disaster. Instead of rewarding Timofey for his efforts, the plant treats him as a scapegoat, offering no compensation to him or his family. Desperate to provide security for his wife and son, Timofey steals a small amount of Pu-239, weapons grade Plutonium and heads to Moscow to sell it on the Black Market. Caught up in the "new Russia" of hoods and hookers, Timofey struggles to make the sales; his efforts resulting in deadly consequences.