The Midnight Line

Forget dusty castles and velvet capes. In this world, vampires are the Sanguine Elite?ultra-wealthy tech-barons who used bio-engineering to perfect immortality. The only catch? They still need human blood to power their cognitive enhancements, and they still burn in the sun.
To solve their daylight problem, they built The Apex: an ultra-futuristic, subterranean hyperloop transportation network that spans the globe. Vacuum-sealed and traveling at speeds over 700 mph, The Apex allows the vampire elite to move between continents ahead of the sunrise, effectively living in a state of permanent night.

Opposing them is The Vanguard, a underground network of runaway teens who have stolen pieces of the elite's advanced tech. They've modified it to create high-tech exo-suits, giving them superhuman strength, cloaking abilities, and light-manipulating weaponry. To the public, they are dangerous vigilantes; to the oppressed, they are superheroes.