At the sound of the gunshot, Xavier broke into a run.

He hadn't known what he would find when he arrived at Old Faithful, but he knew one thing - if Penny was hurt in any way, he wouldn't rest until he'd had his revenge. Until he'd made Nash and every one of his men pay for what they'd done.

He'd only taken a quick look at the map Rinaldi had drawn on the last clue. But he remembered that it indicated the treasure was hidden somewhere on one of the trails on the ...