Ten-year-old Liam and his two younger sisters, precocious third-grader Dakota and second-grader Izzy, who has Down syndrome, face the possibility of losing their beloved dog, Cupcake, who keeps urinating on their apartment's carpet.

Twelve-year-old Ivan has escaped from the siege of Leningrad, but when the town he has taken refuge in is occupied by Hitler's troops, he sees his chance to help the partisans he has met--and to rescue to German shepherd puppies, Zasha and Thor, from the cruel Commander Recht.