She filed the wrong papers. Now she's filled with hellfire.

When curvy bookkeeper Jade Martinez thinks she's doing her eccentric boss's weird filing in the office basement, she accidentally completes an ancient summoning circle, calling forth Lock—a hellhound enforcer who mistakes her for a witch trying to bind him.

But her pure soul and virgin scent trigger his mating instincts so hard he immediately goes into rut, his infernal knot already dripping as he explains she has two submit to him or get dragged to hell anyway.

As Jade discovers that submitting to a hellhound means constant knotting and praise for being such a good little mate, she realizes some accounting errors have incredible benefits—especially when her familiar bloodline means she was literally made to take his knot.