On a mountain face, your climbing partner is your only life insurance. There's scarcely another place on earth where you have to be able to depend on each other absolutely. Agnes and Ragnar are a well-practised team, both in love and on the mountain, and this time their ascent goes without a hitch. But Agnes is suddenly inattentive and jumpy. Here, of all places, she makes a discovery that destroys her trust in Ragnar.