Magic doesn't expire at forty.

London, rewritten by shadow and spell, hides a secret magical intelligence service: The Department of Dark Errands. Its operatives don't just hunt traitors—they track the things that slip between worlds.

Once the Department's brightest commander, Nyra Vex now lives quietly at forty-five, running a small apothecary along the canals of Little Venice. She blends teas for widows and grief-torn strangers, her past life buried behind scars and silence.

Until a shadowbeast tears through her wards and whispers her name. Dragged back into the Department's grip, Nyra is reinstated, rearmed—and paired with the one man she swore she'd never see again. Beck Morran. Her lover. Her betrayal. Dead ten years. Now he's alive—reanimated, cursed, and bound to the Patron's coin.

As Nyra and Beck navigate a labyrinth of assassins, forbidden magic, and conspiracies older than Boudicca, the tether between them reignites—part weapon, part desire, part doom. Every mission pulls them deeper into the Department's shadowed underworld of archives, sigils, and living magic, where loyalty fractures and survival is never guaranteed.

But Nyra carries a secret of her own. She is shadowmarked—touched by a power the Department fears and cannot control. That magic may be the only force strong enough to free Beck from the Patron's curse. Or destroy everything they've sworn to protect.

Because some magic waits a lifetime to awaken.