Only an Orphan can stop an Orphan. Murph and Jack are on the hunt for the biggest prize of them all: the Fifth Gate. But what exactly is it? And what will they do when they find it? Jack thinks he knows the answer, but what they find might not be what they expect. To make matters worse, someone else is on the hunt. And not just anyone, but another Orphan, and a powerful one at that. With his team by his side, Murph saddles up and prepares for a fight he won't soon forget.