This will be unfortunate for the affairs of the house where Saturn is and also the house(s) with Capricorn on the cusp. The lower the person's vibration, the more pronounced the effects.
For example, Saturn at 15 degrees of Leo in the 1st house (one's body), with Capricorn on the cusp of the 6th house (one's health). With this there will probably be serious health problems or disabilities.
With Saturn at 15 degrees of Leo in the 4th house (childhood and family) and Capricorn on the cusp of the 9th house (religion), the family may have been religious fanatics who dragged the person off to church where the person suffered extreme physical and mental abuse. If Capricorn is also on the cusp of the 8th house, sexual abuse is likely to have occured as well.
With Capricorn on the ascendant and Saturn at 15 degrees of Leo in the 7th house, the (marriage) partners can be extremely abusive and use the person viciously in every possible way. This is much worse than a 'regular' Saturn in the 7th house placement, as Saturn is the chart ruler, and also due to the nature of the 15th degree. The person will probably be treated like crap by everyone they interact with, to the point where it can kill the person, either through the person's interaction with people, or through suicide due neuroticism from lack of healthy and positive interaction with other people.
The above are theoretical and very grim examples I made up, but you should get the idea. One's chart manifests with age. So if one has this, it's important to cancel out the karma by raising one's vibration and burning it off so it doesn't manifest. The Munka working targest things like these directly when proper affirmations are used. And, obviously, take the necessary precautions- if Saturn is at 15 degrees of Leo in the 6th house, you probably shouldn't do triathlons, for example.