Ellie Harrison, a tall, self-described “geeky” junior-to-be, temporarily moves to Annapolis with her eccentric parents, two medieval history professors who are on sabbatical. In a nearby park she encounters a strikingly familiar teenage boy, Will Wagner, [Gregg Sulkin], who is clearly the center of attention at Avalon High. He’s there with his best friend Lance Reynolds, [Chris Tavarez], a confident football player, and Jennifer Gold, [Molly C. Quinn], the glamorous head cheerleader and Will’s girlfriend. This initial meeting sets the stage for a school year that blends romance, mystery, and a strange fate tied to Arthurian legend.
At Avalon High, Ellie proves herself capable and curious, and she’s paired with Lance on a literature project for Mr. Morton, a pairing that quickly reveals Lance as a likeable enough kid but a bit of a slacker beneath his popular surface. Will soon becomes a constant presence in Ellie’s world, dropping by her home for dinner and leaving her with a crush that grows as she learns more about his life, his Navy-officer father, and the complicated family ties that connect Will to Marco Campbell, a troubled teen who was expelled from Avalon High.
The social circle spins further when Ellie uncovers a painful truth at a post-football party at Will’s house: Lance and Jennifer are having an affair behind Will’s back. Marco hints that he knows more than he lets on, adding a darker undercurrent to the evening. On a following day, Will invites Ellie to a sailing trip with Lance, Jennifer, and Marco, a invitation that leads to a tense confrontation on the water. Marco cryptically calls Ellie “the Lily Maid,” a nickname that hints at deeper mythic echoes, and later reveals the nature of the relationship among the group—especially the affair that has unsettled Will.
Back at school, the pressure intensifies as Ellie tries to keep up with her project while dealing with Lance’s absence and the fallout from the exposed affair. A visit from Mr. Morton and a shocking revelation about the Order of the Bear—an ancient fraternal group that believes King Arthur will be reincarnated—turns the story toward a supernatural undertone. Morton explains that Will, whose full name is Arthur, is the reincarnation at the heart of a prophecy, but the betrayal by Jennifer and Lance has left him hesitant to fight the looming evil, embodied by Marco.
Morton’s warnings deepen when Ellie learns that Will’s supposed stepmother is actually his biological mother, which in turn makes Marco Will’s half-brother. The tension peaks as Marco steals Will’s father’s gun and goes on the run. In a final push, Ellie aids Will by presenting a medieval sword—that her father had been studying—foreshadowing her own connection to the legendary Lady of the Lake, who would provide Excalibur to Arthur in legend. This revelation reframes Ellie’s role in the mythic cycle and cements her bond with Will as they face the looming conflict together. After the climactic confrontation, Ellie and Will begin a new chapter together, united by the truths they’ve uncovered and the shared responsibility of facing what comes next.
