A Crown of Ice

It's been a year since Mairead revealed to her entire kingdom of Munster about the ice powers she wields and since has learned to come to terms with her new freedom, but still struggles to control her powers.

As Mairead tries to restore Munster from its climatical state from the previous year, where she accidentally froze the entire kingdom, she gains respect from her people who have come to accept her. But as things seem to finally be settling down, she discovers that a group of rebels do not wish to see her rise in power and conspire to overthrow her, claiming that she will doom the whole kingdom as her powers become stronger.

Leaving the kingdom in the hands of her sister, Roisin and Collin (her fiancé) Mairead sets on a quest to find the true source behind this rebellion where it will take her unexpectedly to the land of the Vikings where Ragnar and his team will come face to face with the Snow Queen.