Young Jonatan Harker wants to practice medicine alongside Professor van Helsing. In order to do so, he must leave his hometown and his fiancée and move in with a particularly peculiar roommate. This decision will change his entire life.
The condemned Jacob Hoffman leaves Hell for six days as part of a leave of absence for good behavior. And he is given the demon Azazel as a guardian to watch over him during his stay on Earth. But it turns out that Hoffman's past inevitably begins to complicate the whole situation.