Composite Pluto in 10th house:

Pluto has to do with death and rebirth, regeneration, power and its uses or abuses, obsession and fanatical behavior. Pluto located in the 10th signifies this great power is being applied to some very clear objective. The objectives that you have set will not only impact your relationship greatly, but the people and environment around you as well. The downside of Pluto here is that you may use power for power's sake, as its own reward, and when power is used along negative lines, then it can turn people against you, perhaps in very violent ways, because they see you as a threat. Pluto in the 10th house is very driven towards an end, thus making the two of you very ambitious. Other people will feel that power just by being around you. Should your ambitions be in the area of business and politics, you should do well as long as you keep the above tendencies in check. If you do not or cannot, then you will suffer the consequences and perhaps ruin your reputation(s). Either way, you may become very influential, making differences not only in your own lives, but for the world as well. Pluto here will not let anyone or anything stand in the way of what you want, so make sure you are careful of how you treat people. Don't make the mistake of feeling you are the ultimate power because you are bound to meet someone more powerful and ruthless than you, thus bringing devastating results.

This interpretation is from the Relationship Composite Report.

Do you and  your partner have composite Pluto in the 10th house? What's it like?