When Siria hears sirens, she sneaks out to chase the trucks and bring Pop and the other firefighters luck. She'd be in trouble if she were caught. Good thing her dog, Douglas, is always by her side. As Christmas approaches, Siria suspects that someone is setting fires. She has to find out who, but when clues point to a surprising suspect, she realizes that solving this mystery will take all kinds of courage.
In 1944, WWII is raging and Jayna is living in upstate New York with her big brother Rob. Rob is called to duty, but before he goes he tells her that they may have a secret grandmother in Brooklyn. When Jayna learns that Rob is missing in action, she sets off on a trip to Brooklyn in the hopes of finding her grandmother.
Rachel, Cassie, and Joey live in the city with their Pop, until Pop's search for work lands the family on a run down farm. Times are hard there, too --- the school and library are closed. When Pop gets work near Canada, he has to leave the children on the farm alone. For two months! But Rachel's the oldest, and she'll make sure they're all right. Somehow.