Fabulous cartoon about an eternal winter. When an ancient prediction comes true and the Kingdom immersed in embraces of eternal winter, three fearless heroes — Princess Anna, brave Kristoff and his trusty reindeer Sven — go to the mountains to find sister Anna, Elsa, which can withdraw from the country's chilling spell. Along the way they will find many exciting surprises and exciting adventures: meeting with mystical trolls, acquaintance with charming snowman named Olaf, mountain peaks abruptly Everest and magic in each snowflake. Anna and Kristoff have to unite and resist the mighty elements to save the Kingdom and those who are dear to them. Cartoon "the Cold heart" is based on the fairy tale by Hans Christian Andersen's "the snow Queen".