John (Jack Reynor) lives with his mother, Jean (Toni Collette), in a social housing suburb and ekes out a meagre living as a nocturnal taxi driver. John returns home, one morning, to find his mother unconscious from an alcohol overdose--this was not the first time. Jean violently rejects John's attempts to help as well as his intentions to unite the family. When Jean is offered an opportunity to recover and with no savings or insurance, John is forced to offer his services to a petty criminal, to help pay for his mother's costly rehab programme. John is subsequently faced with a life-changing task that may alter him and his family's lives forever.