When Geronimo Stilton learns someone wants to steal the antique silver skates being offered as a prize in Mouse Island's annual winter Ice Skating Championships, he races to uncover the mysterious thief and save the prize.

Yasmin and her friend Emma are going to the ice rink, but Yasmin is nervous and does not want to admit that she has never skated, so she delays going on the ice as long as possible--but when she falls down Emma's mother offers to teach her, and Emma helps.