Josie is timid at school, comfortable at home, and confident when she and her dog Clementine are volunteering at the pediatric ward of the local hospital; Oscar is acting out and in trouble at school, miserable at home, and forced to volunteer as a punishment; Gabby is popular at school, but her perfect life is threatened because she is hiding a dangerous medical condition--but at the hospital the three children are brought together by Clementine at Christmas.