Hollow Fever Heartbeat

Amidst the chilling spread of Hollow Fever, two American sisters, the protective Mae and the reckless Cassia, find their European adventure turn into a nightmare in the shadowed streets of Russia. A feverish stranger’s desperate bite, meant for sustenance, not transformation, rips Cassia from her human life. As the world reels from the sudden emergence of supernaturals, Mae makes a desperate, morally gray choice: she refuses to let go. To save her sister from the bite's slow, agonizing death, Mae offers herself to the same shadowy curse, binding them through a primal, possessive mate bond that feels less like destiny and more like a desperate, bloody claim. Now, both twisted by a hunger they never asked for, they must navigate a world unraveling, forever tethered to the creature who claimed them, fighting not just for survival but for any remnant of their humanity, and each other, against the encroaching darkness and their own burgeoning monstrous desires.