Mandy Flood has her heart set on having a pet but her mum who's allergic to fur is not keen. However, when Mandy rescues a squirrel from Dusty's clutches, she decides to secretly smuggle him into her room. Left to his own devices, the little 'live wire' gnaws through the flex of Mandy's TV and starts a fire.

Scruffy dog Dusty is chosen to be the Fire Station mascot, but first he must have a bath. Not keen on the idea of a wash, he decides to flee. The twins are determined to find him and a game of hide and seek ensues. Meanwhile, accident-prone handyman Mike Flood starts a fire at the Mountain Rescue Station and has to radio for help.