Lucy competes with her friend Carolyn Appleby over invitations and scheduling for Little Ricky's birthday party. When her husband Ricky mentions that Superman is in town, Lucy tries to get Superman to come to Little Ricky's party, sure that this will make it a much bigger draw than the one Carolyn is hosting. Ricky tries, but Superman can't make the party. So Lucy disguises herself as Superman, but gets herself into great peril. Fortunately, the real Superman does show up to save the day.