Every year on the Isle of Struay there is a grand concert where the islanders play fiddles recite poetry & sing & dance in front of their friends & neighbours. This is a major social event in a small community like Struay. Katie Morag is very excited indeed & she plans to sing her favourite song. Arriving for the concert too are Katie Morags uncles Sven & Sean who are world-famous musicians & utterly identical. Nobody on Struay can tell them apart. On the big evening one of the pair loses his voice & it is down to Katie Morag Mc Coll to save the concert from disaster.