Billy Beaton is the wild card in a Highland family band. Nicknamed Billy Bùrach (Billy Shambles), his chaotic piping and unruly ways are more often a problem than a performance. But when a group of alien superfans arrive in Corabost, having travelled across the galaxy to hear their idol play, Billy discovers he's a musical legend across the galaxy. Torn between newfound fame in the stars and being left behind on Earth, Billy must decide where he truly belongs.