Twelve-year-old Maggie's stutter causes her much heartache and only her menagerie of pets, whom she can speak with fluidly, provide her comfort, but when she finds Rumpus, an abandoned snow leopard, in a forest in Cornwall, their chance encounter will change their lives forever.

Fifteen-year-old Peak Marcello is invited to participate in an "International Peace Ascent" in the Hindu Kush, with a team made up of under-eighteen-year-old climbers from around the world--but from the first something seems wrong, so when the group is attacked, and most of the climbers are either killed or kidnapped, Peak finds himself caught up in a struggle to survive, shadowed by the Shen, a mysterious snow leopard.