Shadows are perspective. For Jim Jensen, a decorated, jaded marine vet. and current wise-cracking doctoral candidate, shadows are shadows until he stumbles upon something of mythical proportions while employed by a former professor on a quest for bigfoot.

Meanwhile, he careens into the crosshairs of a ruthless drug cartel. With surprises abundant, Jensen breaks a vow he made when tragedy struck in Afghanistan, and his own primal instincts return him to a new type of active duty. Running two races in tandem, Jensen finds surprising foes and allies as he scrambles to save the beloved, the innocent, and the unknown.