Meagaidh the Border Collie is a search and rescue dog who works with her owner Tom. Her supernose follows scents and smells like clues, so they can rescue people who need their help.Meagaidh and Tom are visiting a school to show the children how a search and rescue dog works. They demonstrate some of their equipment, including Meagaidh's special doggy goggles, which she wears to keep the wind and dust out of her eyes when she's in the helicopter. Tom demonstrates how Meagaidh is lowered from the helicopter all the way down to the ground using a special harness. They also demonstrate a practice rescue mission, playing hide-and-seek with the children to show them how Meagaidh's supernose can follows scents and smells like clues.But when the school cook goes missing with the children's cheese sandwiches, Meagaidh has to use her supernose for real. Can she help Tom track down the cook and rescue the children's lunches?