In the city of Accanter, the immortal Ageless rule absolutely — and the Watch exists to keep ordinary people in line, not to protect them. Newly promoted Watch Officer Thea March is different: she actually investigates when people die, even when the victim is nobody important and the trail leads to one of the elite. When her first case points toward an Ageless killer, she finds herself partnered with Mage Niath in an investigation that neither of them was supposed to care about.

Thea March is competent, principled, and determined to do her job properly in a system designed to prevent her from doing so. She has spent her life avoiding the attention of the elite, which makes being forced to work alongside one of them a constant, low-grade crisis — one she handles with quiet tenacity and growing trust.

Across six books, Thea builds a working relationship — and something closer — with Niath while confronting escalating threats: serial killers, a corrupt Watch, the fury of the Archon herself, and a human faction determined to bring the Ageless down regardless of the cost. Each investigation deepens the world and the stakes, until the final book forces Thea to stand between two powers that care nothing for the people caught between them.