James has a new model airplane which Norman has a go at but flies it into Station Officer Steele who demands that he not fly it in Pontypandy. Norman persuades James to take it to the Mountain Rescue Center and fly it but it lands in a tree and leads to them getting stuck.

The residents of Pontypandy wake up to find the whole of the town flooded! Fireman Sam and Tom Thomas the helicopter pilot lend a hand where they can and Fireman Elvis Cridlington and Firefighter Penny Morris come to the rescue in the rescue boat. Meanwhile Norman Price goes off to look for Woolly and Lambykins.