"Eva and Marin live on Lighthouse Rock, where nothing happens beyond the spinning of the lighthouse beside their home. That all changes, however, when Marin discovers she is a Selkie, a legendary creature of the sea. Before the sisters can come to terms with this, they are whisked away and find themselves on the run from a wicked sorceress, bent on ridding the sea of magic once and for all. With only their wits and an unexpected band of magical creatures to guide them, the two must make for home before it is too late." 

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