At the stroke of midnight on the dawn of December, five-year-old Finn Albedo is found frozen in the city park on a pedestal of ice. The doctor says his heart is beating, but no one can wake him. Finn's big sister, Bianca, suspects the beautiful sparkling book Finn got from the library has something to do with it all but the mysterious book has vanished and no one will listen. As more children are frozen, Bianca realises she's running out of time. Is there a connection between the peculiar stranger wearing a top hat and the disappearing books? The search for truth hurls Bianca into a fantastical winter wonderland where all is not as it seems. Can Bianca remember her mission and find a way to save her brother and the other Ice Children before all their hearts are lost forever?