Meera, Sophia and Olivia, the Princess Dolls, are busy planning their mid-Winter celebration in Dolly Town when they get a call through from Mission Control - the Snow Princess on the Majestic Isle needs their help. It's her baby sister's Naming Ceremony that afternoon and she is due to wear the famous Ice Diamond Tiara - but she's lost it! Can the Princess Dolls help the Snow Princess find the tiara in time for the ceremony?