The sleepy town of Ballyrogin seems like any other quaint Irish village, with its cobblestone streets and thatched-roof cottages. But a dark secret lurks beneath its pastoral facade.

As St. Patrick's Day comes and the parties start, Kieran and Cael feel their cravings intensify, an ancient, primal urge that has cursed their kind for centuries.

As the sun rises after the aftermath of the carnage. Only one truth remains: the streets will forever run red with the blood. A grim reminder of the horrors that lurk in the shadows of the Emerald Isle.