The film focuses on the British care homes that were hit hard by the first wave of the COVID-19 pandemic. In a fictional care home in Liverpool, a young care worker (Jodie Comer) and a patient (Stephen Graham) have their lives changed forever by the COVID-19 outbreak in the spring. Sarah is smart, but she has never been sociable in school and work. Her family thinks she is destined to achieve nothing, but she unexpectedly finds that being a care worker at Sunshine Care Center is her calling. Sarah is very good at communicating with the residents of the care center, especially 47-year-old Tony. Tony suffers from early-onset Alzheimer's disease and his brain is gradually degenerating, which forces him to live in the care center. The disease causes him to have intermittent confusion and sudden violent behavior, which other staff find difficult to deal with, but under Sarah's care, he gradually begins to open up to her. Sarah's success in caring for patients helps her regain her self-confidence. When the COVID-19 outbreak broke out in March 2020, everything Sarah has achieved was questioned. She and her colleagues did their best to fight the epidemic with inadequate equipment and preparation, and the authorities didn't seem to care about them. Determined, Sarah sought to protect the people she cared for, whose illnesses compounded the suffering and loneliness they faced. But the persistence, hard work and selflessness of the care home staff were only going so far, and Sarah was desperate to find a way out. Care homes in the UK have been particularly hard hit by the pandemic, with more than 19,000 residents dying from the virus. Care homes are in one of the strictest lockdowns in the UK, with residents unable to see their loved ones in any significant way for fear of infection among vulnerable people.