Also called Time Prisoners, this is based on a Chinese webtoon by Bai Xiao. It's an alternative world where people researched and found the cure for a mysterious sleep-deprivation sickness where people became mad 60 yers ago. Those people who were treated are now wearing a black collar who produces a dangerous side-effect: they become vampires. However, this story will take a more grave situation when these vampires/bloodivores start to be menaced by some mysterious Special Forces. 哈哈哈。时空使徒。看完想追第二季系列番！！！。 60年前，前所未有的“不眠症”袭向这个世界。无法睡着的人们在精神上一个接一个的生病。自杀、严重的暴力事件也因此频频发生，而变成一个重大的社会问题。虽然状况随着新药剂的开发，而渐渐的安定下来。但因为药剂有副作用，也因此造成20亿人的发病，间而诞生「嗜血种」这样的新生命体。之后，“嗜血种”与人类之间的战争爆发, 虽然最后以人类方的胜利收场，但是残留下来的嗜血种却还是存在于这个世界上….。最终，人类凭着人造血液及被称为“D-GPS”的嗜血种管理系统，来保障嗜血种的生存权利。 这个故事，是在人类与嗜血种共存为日常生活的舞台上进行的。
