Rosalina finally returns from her round-the-world cruise. But to Nat's dismay, as the band begins rehearsals for a reunion TV special, a rival for her affection shows up. Michel, a handsome young Frenchman from the ship and a brilliant piano prodigy, drives a wedge between Nat and Rosalina which culminates in their breaking up and Roslaina leaving the band. Needing a new bass player, The Naked Brothers Band conduct a nationwide competition and find the perfect choice - except for one problem: Nat isn't ready to let anyone take Rosalina's place.
—Anonymous