Two young men wager that their fiancées could never be unfaithful. Coached by a cynical older friend, they fake a departure, return in disguise and set out to court each other's partner, with a sharp-eyed maid paid to help the scheme along. What starts as a joke at the women's expense becomes something none of the four can unknow. Mozart's comedy of fidelity, vanity and self-deception, on a 1950s Coney Island boardwalk.