In Dublin, a young Nigerian girl, Esme Lukasa, is found dead at a bus stop opening an investigation into her violent death. This leads Inspector Jen Rooney and her team of investigating detectives to a Direct Provision Centre for asylum-seekers. It is soon discovered that another girl from the center has disappeared. The police enter a murky underworld of slumlords and traffickers to find out who killed Esme and rescue the missing girl before she suffers a horrific fate.