The year is 2075, and when FBI Special Agent Killian Gray's federal homicide team, dubbed "The Blood Squad", is called to solve a heinous crime, the case takes them into the dark underworld of the Sangerian Vampire clan. Killian is forced to team up with the vampire clan Chief of Security, Dacon Sangerian.

Dacon's people have been providing protection for the Sangerian Clan since its formation. Bred from a long line of warriors, Dacon toes the line of the blood clan laws and takes his responsibilities seriously. Clan regulations dominate his life. The first blood rule of the Sangerian Clan is simple — turning an unwilling human into a vampire is punishable by death. It is Dacon's job to ensure this rule is followed.

As Killian and Dacon work to solve a case that could start another war between humans and vampires, they battle with forces of evil that could destroy them both.