In this unsparing drama set during the early days of covid, Jodie Comer is Sarah, a young do-gooder who takes a job at an assisted care home in Liverpool. Before long, the novel virus is raining havoc upon the residents, many of whom are elderly. Sarah and her staff do what they can, but when they make external phone calls for help they are faced with the terrifying reality that the system is overwhelmed, and no one is coming to help.