Masked By Danger by Christa Wick

Cade Mercer has spent nearly a year locating and saving latents—human mates of wolf shifters—from the deadly Hunters who’ll stop at nothing to find them before their mates can.
The newest latent his team has been sent to extract, however, isn’t a latent at all. She’s a she-wolf, a rare alpha female shifter whose mere presence can cause mayhem and bloodshed among unmated male shifters.
As if that weren’t complicated enough, she’s also apparently a highly-regarded homicide detective working a big case…while in heat.
And last, but certainly not least, she just so happens to be the one woman Cade never thought he’d ever see again.