Mason Starling is a champion fencer on the Gosforth Academy team, but she's never had to fight for her life. Not until the night a ferocious, otherworldly storm rips through Manhattan, trapping Mason and her teammates inside the school. Mason is besieged by nightmarish creatures more terrifying than the thunder and lightning as the raging tempest also brings a dangerous stranger into her life: a young man who remembers nothing but his name--the Fennrys...