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Lisa is Swiss mountain climber whose life is destroyed when her philandering ex-boyfriend Rob drops a boulder of bad news upon her. The two broke up shortly after Lisa returned from a failed attempt to climb the Matterhorn and found Rob in bed with a stranger. To work off her anger and grief she rappels down the side of a tall hotel building. Just before the police catch her, she drops into the room of Sam, a serious young pianist preparing for an up-coming competition. An introverted mama's boy, Sam seems an unlikely candidate for being her next lover, but after Lisa gives Sam a few mountain climbing lessons, that is exactly what he becomes. Unfortunately, Rob has been trying to find her, not to win her back, but to inform Lisa that he has been diagnosed as HIV-positive. Lisa, too tests positive and now she must use her mountain-climbing skills to scale the high walls of the remote mountain monastery where Sam has gone to prepare for the semi-finals of his piano competition.