When he hears of a recent bloody attack in a remote Mongolian river, angler Jeremy Wade wonders if it could be the work of a giant fish so rare that it’s more legend than fact.
Pound for pound, this man-sized monster is said to be one of the world’s strongest fighters on a line – or at least, it was.
With illegal gold miners poisoning its last hideouts, it’s anyone’s guess if this pumped-up predator is still alive and biting.
Jeremy’s quest to track it down leads him into a vast landlocked wilderness where the only people he’s likely to meet are gun-toting outlaws.
Could the rivers here still be home to a beast that Jeremy has read about but never seen?