It's the day of Pontypandy's new Ocean Rescue Centre launch and Station Officer Steele is taking the firefighters on a tour of the centre. As they arrive on the quay, so does the new coastguard, Ben Hooper.

It's the annual Pontypandy Cheese Roll Challenge (a race down a hill chasing a giant circular cheese) and Norman really wants the prize - the giant cheese! He sets out to win, but is it too late to enter the competition?