The murder of an ancient king spurs teen Sarah Matthews to travel back in time, putting her life in jeopardy as she races against the clock to solve a thousand-year-old mystery and pick up the pieces of her star-crossed romance. Her return to Serimone reveals that the kingdom is in upheaval, and unable to right the empire alone, Sarah enlists the help of Will, an enigmatic blacksmith who moonlights as the Shadow, Serimone’s vigilante. Together they search for the murderer at the castle, though the fearsome solitude of the stonework prison presses in on Sarah, and her heart is broken when an imposter tragically claims the life of someone close to her. As if in answer to her need for friendship, a dashing Spaniard named Damien swoops in with his kindness and charismatic charm. But as Sarah draws closer to him and to the faceless killer in their midst, she realizes that the severed threads of time and the mystery surrounding Serimone Castle are unraveling rapidly, weaving new tapestries of devastation. Sarah is forced into harm’s way countless times as she races to solve the puzzle before it is too late and Serimone becomes nothing more than a faded memory of the past. . . And before Sarah herself becomes a permanent fixture in history.