1824年成立的皇家全国救生艇协会(Royal National Lifeboat Institution)是提供救生服务的慈善组织,现有5000名志愿者,近200年来共营救超过14万人。Cameras follow the men and women that make up the crews and lifeguards of Britain's RNLI (Royal National Lifeboat Institution), an army of unpaid volunteers who risk their lives to save the lives of others.