The Pepper twins, Esmé and Monty and their uncle Potty have been summoned to the Sea Spray Theatre on the end of Crab Pie Pier.They're on a mission to keep the old theatre from closing and must perform the show of a lifetime to reel in the crowds. But not everyone wants the theatre to survive and a certain someone is determined to sabotage the show, whatever the cost ... Add a strange island hideaway full of zany inventions and the Peppers are in for an unforgettable summer.