They say the monsters hide in the shadows. Cass Raynes is the shadow they should fear.

For thirty-two years, Cass has walked a razor’s edge between our world and the nightmare realm where creatures of darkness thrive. A field agent for the clandestine organization known as The Borderwatch, she’s not just a monster hunter – she’s a survivor of horrors that would shatter most souls.

The Borderwatch is a secret organization that has existed for centuries. Its purpose is to protect humanity from the monsters lurking in the shadows.

Orphaned at a young age by a Level B beast that tore her family apart, Cass was raised within the Borderwatch’s harsh training program, forged in the crucible of loss and fueled by a burning vengeance. She’s seen things that can’t be unseen, fought battles that leave scars deeper than any blade, and learned to trust no one but herself and the cold steel of her weapons.

Whispers follow her through the hunter bars – rumors of impossible shots, daring rescues, and a ruthless efficiency that chills even the most seasoned veterans. Some say she’s haunted, cursed to forever relive the moment her life fractured. Others believe she’s a weapon, honed to perfection by the Borderwatch to stand against the encroaching darkness.

But beneath the hardened exterior lies a secret, a vulnerability she guards fiercely: the lingering trauma of her past, the nightmares that plague her sleep, and the gnawing fear that one day, the darkness will finally consume her.

Now, a new threat is rising – a series of coordinated attacks by intelligent Level A monsters that hint at a conspiracy reaching the highest echelons of power. Cass finds herself caught in a web of deceit, forced to confront not only the monsters lurking in the shadows, but also the demons within her own fractured mind.

Is she humanity’s last hope? Or will her past finally catch up to her, turning her into the very thing she swore to destroy?