Cal Leandros is a half-human, half-demon hunter tasked with protecting the human world from supernatural threats, but his latest case forces him to confront a terrifying entity from his own past. Cal, along with his brother, Rune, must navigate a dangerous underworld filled with ancient evils and treacherous alliances. The primary conflict arises from a powerful demon seeking to unleash chaos, a threat that strikes at the heart of Cal's personal life and his duty as a protector. The narrative unfolds through Cal's first-person perspective, revealing the gritty realities of his existence and the moral compromises he must make.

The Cal Leandros series is known for its fast-paced action and dark, gritty urban fantasy setting. Readers often praise the complex character dynamics, particularly the relationship between Cal and his brother Rune, and the intricate world-building that blends mythological elements with contemporary life. The series typically delivers high-stakes supernatural conflicts that challenge the protagonists both physically and morally. This installment, Slashback, continues to explore these themes, offering a thrilling continuation of Cal's ongoing battle against the forces of darkness.