space-time prisoners (时空囚徒) is a vampire survival action Chinese webcomic written and illustrated by Bai Xiao.

[2] 60 years ago, some people began to suffer from a strange case of insomnia that struck the entire population.

A new medicine was produced to cure the illness but it has a side effect which turned patients into vampires.

They are feared by other people and wear a special necklace that sends a signal to the police if a Bloodivore is unable to control their emotions.

Then a strange thing happens where they are thrown into a mysterious place with a lot of unexplainable monsters along with other sentenced-to-death prisoners.