The rut has arrived for Trevor Lancaster, an uncontrollable surge that demands he breed the forbidden heir to secure the ancestral hoard. Helena Remington pushes back in every glance, her throat baring despite the fierce denial of the bond that would end their isolation.

Their alliance against rivals keeps drawing them back to the mist-shrouded cave and the cold boundary stones. The breeding instinct climbs with each meeting, turning necessity into an obsession neither can name.

Pride and pack law have long forbidden this, and the rut answers to neither.