About John (Jack Reynor, Transformers: Age of Extinction) lives with his mother, Jean (Toni Collette), in a south Dublin social housing suburb and ekes out a meager living as a nocturnal taxi driver, barely making ends meet. He returns home one morning to find his mother, an unwavering alcoholic, unconscious - and this was not the first time. Hospitalized after this overdose, Jean's best hope is a costly private rehab clinic, but she violently rejects John's attempts to help her, as well as his intentions to unite the family. With no savings or insurance, John is forced to offer his services to a petty criminal to help pay for the pricey recovery program, subsequently forcing him to face a life-changing task that may alter him and his family's lives forever.