Legend of Duo - S01

In the early 21st century, humanity faces extinction. A mysterious virus drains the life from people, leaving only one possible cure: vampire blood. For years, vampires have kept the secret to stopping the virus, deepening the divide between their kind and humans and plunging the world into chaos. Duo, a vampire who revealed the secret to saving humanity, is now hunted as a traitor by his own kind. Zieg, a powerful vampire, is tasked with tracking him down. But duty clashes with personal ties-Zieg must decide whether to kill the man who betrayed their race or let their shared history change his mind.