It's a very hot day in Pontypandy and Joe has created solar gadgets even one that has a fan but Hannah her daughter wishes he was more of a cool normal dad but when a fire occurs it might help.

Sam and Ben work together to fix a special camera onto the shell of a beautiful blue Leatherback Sea Turtle, so that they can see underwater from its point of view. The camera comes in handy when Norman and Mandy, who are out turtle-spotting alone in a boat, get in trouble at sea.