}}
Way out Life in the furthest part of Fira tribe is fairly ordinary by this world's standards; playing football with the known worldother kids, a tiny stronghold exists all on its owntrying not to get eaten by Leviathans, cut off from avoiding his grumpy yeti Guardian. Such is the rest of human-kin by monsters that lurk beneath life Ash leads, walled up in the Snow Sea. ThereFira Stronghold, surrounded on all sides by a little boy called Ash waits for the return sea of snow and monsters. Abandoned by his parentsas a baby, singing the only thing Ash has to remember them by is a forbidden lullaby that he sings to remind him of themhimself whenever he's lonely... and doing his best to avoid his very, VERY grumpy yeti guardianBut, Tobu. But life is about to get a whole lot more crazy-adventurous for Ash. When after a brave rescue attempt reveals he that Ash also has amazing magical powersa taboo power, he's whisked aboard joins the crew of the Frostheart, to embark on a sleigh packed full life of daring explorers who could use his helpexploration and discovery. But can they help him , Ash yearns to find his family , and he hopes the crew will help him with this. . . ?
The characters are varied and the interactions with each other provide some of the more heartwarming and funny moments in the story. The protagonist is Ash, a young boy of the Fira tribe. He is a song-weaver, a person able to communicate with the Leviathans. His guardian is Tobu, a very serious and stoic yeti. He and Tobu join the crew of the Frostheart, which is under the command of Captain Nuk, a stern-but-fair walrus-woman, and her first mate, Master Podd, a vulpis (an intelligent fox-like creature) of few words. Ash's main friends aboard the Frostheart are Lunah, an energetic and snarky girl about his age who serves as the ship's lookout, and Shaard, an older man with an interest in The World Before who wishes to steer Ash away from Tobu's teachings. They all look out and rely on each other despite any and all setbacks.