The Russian mystical series "Bad Blood" tells the story of a young man with an unusual dark gift. Maxim Sotnikov is 20 years old, he lost his parents at an early age and was raised by a foster mother, and now he is studying at university, unaware of his true past. Shortly before his 21st birthday, the hero learns that his mother, Katerina, was a real witch. Her powers have been passed down to Maxim. Now, if he doesn't find a girl marked with a special sign on her body in the next few months, his consciousness will be consumed by dark magic.