Louis und die Stadt der Vampire

Two separate worlds. A pact between humans and vampires that has been forgotten for centuries. Until someone tries to undermine this pact. Louis gets between the fronts and is to restore the balance of the worlds.
In the city of vampires it is even more sinister than feared. Here bats instead of birds flutter around, gas lanterns flicker and there are coffins for sale. And most importantly, a lot of vampires with very sharp teeth live here. Louis luckily meets the vampire boy Ben there, who wants to help him with his task. He comes from a vegetarian vampire family and his parents also helped people in need - until Ben's father disappeared without a trace two weeks ago. Who is behind the lack of blood deliveries from humans for some time now? In the end, does this person also have something to do with the disappearance of Ben's father, after all, the best-known vampire who is committed to peace?