Legend of Duo - S01

In the early 21st century, humanity faces extinction. A strange virus drains people of their life force, leaving only one possible cure: vampire blood. For years, vampires have kept this secret tightly guarded, deepening the divide between their kind and humans and plunging the world into turmoil. Duo, a vampire who revealed the secret to saving mankind, is now hunted as a traitor by his own kind. Zieg, a powerful vampire, is tasked with tracking him down. But Zieg’s duty conflicts with his past ties to Duo-should he carry out his mission and kill the betrayer, or will their history make him reconsider?