The Hardys have come halfway around the world to experience one of the most spectacular and forbidding mountain rangers anywhere: the Himalayas. Their intention was to do some serious climbing, and they've gotten their wish...with one catch. Not only will they have to cope with the ice and snow and sudden drops, but they may also be heading straight into an ambush -- set by a murderer!

Two climbers were killed in a recent avalanche, and the leader of the expedition is convinced there was foul play. At the top of the list of suspects is Pasang, the uncle of Frank and Joe's friend. When Pasang suddenly vanishes without a trace, the boys realize that the stakes in their climb have just gone up. They're ascending a mountain of mystery...and their lives are on the ropes.