Halloween in Moybeg and the residents are drawn to watch a performance by the travelling show, Marsden’s Big Variety Playhouse. However, the joy soon fades as Maisie Quinn, youngest sister of Sally and Barney, is struck down with Scarlet Fever. Aware of the Quinn’s financial situation and frustrated by Dr. Black’s lack of concern, Rose turns to Captain Dreyfuss for medical assistance from the air base. The arrival of nurse Lieutenant Tillie Zeigler proves to be a blessing and a curse for Rose, but events are soon overtaken when youngest daughter, Kate, also falls victim to the life-threatening illness.