Like Die Hard with vampires.
A scientist and the federal agent who is hoping to keep her alive are trapped in a building with a horde of hungry vampires. It wouldn't be that unusual of a night, if it weren't for the zombies. Caged takes place in an alternate version of modern-day Northern Virginia, where vampires, commonly known as vees, are considered our greatest threat. Cate, a scientist who works for the National Vampire Intelligence Agency (NVIA), is researching a vaccine to immunize humans against vees. Daniel, one of the vees set to be part of her experiments, has other plans. Mason, a special agent with the NVIA, would rather be anywhere else than in the research facility, especially once the zombies break out.