Flt.Lt Murray (David Farrar) is a pilot who fails to join the RAF during WWII and decides to join the Air - Sea Rescue instead. His boat is out in all conditions picking up drowned pilots and taking them to safety. P/O Rawlings (Ralph Michael) is a new recruit who resents joining Farrar's boat and would rather be where the action is - in the air. During a mission, they run into an enemy minefield and an armed trawler... For Those In Peril, presents the work of the Air-Sea Rescue in documentary terms, providing the public with a glimpse of an aspect of war that tends to be overlooked. It was also the closest Charles Crichton (The Lavender Hill Mob, Dead of Night, The Titfield Thunderbolt) got to documentary realism during his long Ealing career. The story was written by Richard Hillary, a fighter pilot in the Battle of Britain whose experiences inspired his book, The Last Enemy.