David Storm learned 10 years ago that he has MS. For this reason and without telling her he leaves his girlfriend, Linda. Now he lives alone and only his brother, Anton, has much contact with him. David has all the time in the world to wallow in self-pity. Until the day that Linda suddenly reappears to tell him that he has a son, Robert. While still a climber in the Himalayas, David learned the saying "The mountain is hard but the butterfly tips up the cat" from Sherpas. David begins to understand this saying with the return of Linda and the consequences of his new-found fatherhood.