During the summer holidays, Ulf goes to stay with his grandma and granddad as usual. And he expects everything to be just like it always is: that he’ll see his friends, swim and squabble with his brother. But this is the summer he’ll never forget. Percy comes to visit, transforming into Buffalo Bill – and above everything else, Ulf meets Pia. Script by Ulf Stark, based on his own novel My Friend Percy and Buffalo Bill.