Tom is headed to Mount Everest. Not only will he get some sweet practice time in on his new foil kite snowboard, but he and Bud are going to put his latest invention -- a robot Sherpa -- to the test. At Everst's high elevations they will really be able to run the Sherpa through its paces.
But Tom can't quite focus on the tasks at hand because while there are always rumors of the mysterious Yeti, Tom thinks he's seen one. And what's more is that there's a nasty bunch of hunters on the prowl to capture the yeti "at any cost." Tom knows that some things are better left a mystery and vows to do what he can to protect this natural environment -- and any mysterious species inhabiting it.