Lin is 11-years-old and living with her parents in a rented house when a mysterious parcel addressed simply to 'Rosenquist' arrives. Lin knows that the package must be for her, even though her father is sure it is for him. She uses the strange key she finds inside to open the secret door hidden in the cellar - and tumbles headfirst into an extraordinary new world. Sylver is a snowy land of eternal winter, where all the inhabitants were once beloved pets or tamed wild animals. Waiting for Lin on the other side of the door is her dearly missed pet vole, Rufus, who takes her on her incredible journey full of adventure and danger. The only way for her to return home is to find the missing Winter Prince, Isvan, and save Sylver before the clock strikes midnight. But not everyone in the Sylver wants Isvan to be found
