Every day in the seas around the UK and Ireland, an army of unpaid volunteers put their lives on the line to save those of others. This series tells the story of the ordinary men and women of the Royal National Lifeboat Institution (RNLI) who are ready to race to the rescue of those in trouble, 24 hours a day, 365 days a year, whatever the weather. Using footage shot on the crews' own cameras, this series takes us into the heart of the action, capturing the unpredictable work of the RNLI in unique detail.

For the thousands of volunteers who guard our seas and waterways, saving other people can mean making sacrifices in their own lives. Volunteer and doctor Adam makes a 500-mile round trip every time he puts in a shift at Tower Lifeboat Station in the heart of London, but his medical skills prove invaluable when the crew are called to help the police try and save a man who is stuck under a pier on the Thames with the tide rising. In north Wales, when police officer Vinny isn't patrolling the streets of Rhyl, he volunteers for the lifeboat crew. When the pagers go off one summer evening, Vinny finds himself heading out into the darkness to try and rescue two teenage boys who have chased a wayward football into the sea and get caught in a treacherous current. While across the Irish Sea in Dunmore East, the lifeboat crew's evening is interrupted by an urgent call to a motor boat stranded several miles out and taking on water. Show less