Allie is a teenage girl who has been dragged from one city to the next by her parents who are both travelling professors who specialize in King Arthur's legend. When her parents tell her that she'll stay in one school until graduation she's over the moon, finally she can join the track team and be a proper student. Avalon High is her new home and as she begins to settle in and start writing a paper on the tale of King Arthur, she begins to see similarities between her life and students in the school to those of King Arthur and the nights of the round table.
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The film is expected to continue without Mendes' involvement.