On a cold winter's morning in Dublin, two heroin addicts commit a terrible crime when an apparent attempted robbery goes wrong. Megan O'Toole, as Minister for Justice, struggles to manage an investigation into Garda corruption. Martin Oakes, a business mogul, is arrested on drugs charges. Nikos Yennaris, a Greek immigrant, tends bar and dreams of a return to his homeland. Michael O'Keefe, a veteran detective, pines for his deceased wife while attempting to keep his job. Arthur Morrissey, a family man, controls the city's drug trade from the safety of a bar stool. Brendan Waters, a journalist of sorts and willing to bend the rules in the name of landing a big story no matter the cost. Over the course of four days, these characters lives come together in the pursuit of a shocking revelation at the heart of modern Ireland.