At 11:30 PM, scholarship student Park Eun-ji is just trying to survive high school and her late-night diner shift without losing her scholarship. But when cold, ultra-wealthy transfer student Kang Min-woo walks in, he brings more than just designer clothes-he brings an ancient family blood curse. Bound by a secret contract and hunted by shadowy creatures from beneath Seoul, the two must rely on salt, iron, and a heavy dose of spite to survive the night but soon they will get closer