While Candy is overjoyed by the birthday card she received from the Cornwell brothers, Archibald and Alistear crash into the hospital's garden with a hot air balloon. Great-aunt Ardley has recalled all her child relatives back to America along with Annie out of fears for their safety if war breaks out in Europe. The boys are mostly happy to be rid of the strict environment and silly rules. Candy is charged with the stewardship of a Special Care patient that has been rushed in with emergency. The young Catherine is a pianist virtuoso and has mysterious stomach pains. The medical test do not explain what ails the girl. And at times, the child feels well enough to climb trees together with Candy. It turns out that her mother who constantly pressures her into playing the piano is the cause. Eventually both Catherine pulling some piano strings and Candy's stubbornness help the mother to realize how she hurts her daughter.
Candy apprend que ses amis sont rentrés aux États-Unis à cause des risques de guerre. Elle a alors la charge d’une petite fille qui fait des crises mystérieuses. Candy s’aperçoit que ce sont des troubles psychosomatiques provoqués par sa mère qui veut la forcer à jouer du piano jusqu’à saturation. Candy réussit à faire entendre raison à la mère en prouvant ses dires.
Tornata al lavoro in ospedale, Candy si imbatte in una bambina prodigio che ha forti dolori addominali. La causa è il fare troppo oppressivo della madre che si ostina a imporle lezioni di piano senza che la figlia possa scegliere il meglio che sente. Candy arriva alla soluzione prima del medico.
Candy de vuelta en el hospital es asignada a un paciente en la habitación especial el cual resulta ser una niña que a pesar de decir que se siente mal, al estar con Candy pareciera estar totalmente bien, lo cual cambia fácilmente cuando su madre le obliga continuar sus lecciones de piano, luego de que alguien cortara las cuerdas del piano durante la noche la madre molesta culpa directamente a Candy quien sostiene que es culpa de la presión de la madre.
