When a mysterious outbreak turns Ashford University into a hunting ground, tennis player Clara barely escapes her mutated roommate Amy. Saved by Noah (fire) and Ryker (beast-shifter), the three soon discover they are no ordinary survivors—they are S-class vessels, bred over twenty years as the three keys to the "Zero Day" project.
The mastermind? Ryker's long-lost father, Viktor Kane—a man half-devoured by the Black Gate he once tried to open.
But Clara is not the key. She is the lock.
The on