Two teenagers are trapped by the incoming tide at the bottom of cliffs. To save them, Navy Rescue helicopter 193 must be flown just metres from the rock-face. Then the pilot spots an injured dog trapped on a narrow ledge halfway up the rock... Meanwhile, at Perranporth beach, the RNLI lifeguards face an incident-packed day, with injuries in the water and surfers swept out to sea. And off the Devon coast, the Torbay all-weather lifeboat is called out to the Karine, a small fishing boat with a suspected engine fire, while the inshore lifeboat goes to the aid of a man who has fallen down a cliff.