Called

Six peculiar people are drawn together through time: Merida Dunbroch and Hiccup Haddock, of the early eleventh century; Princess Rapunzel of Corona and her husband Eugene, of the late eighteenth century; and Jack Frost and Mahina Ó Deóradháin, of the early twenty-first century. They're tasked by the sorcerer that brought them together to retrieve sources of magic scattered across time to save the future, and so their journey begins.

*Posted on behalf of my friend McKenzie Jameson. She also posted this on Ao3 under the username Rainy_day_soft_blanket if you want to check it out there*