Composite Pluto in 11th house:

Pluto has rulership over death and rebirth, regeneration, power, extremes, fanatical behavior and obsession. When located in the 11th house, it indicates that you will work very hard together in order to reach your goals and ideals. As a team you can accomplish anything you desire, while at the same time you can defend each other from unwanted outsiders. Yours is an intense attraction which draws other people to you and they are likely to be very intense as well. This power can be either on the material plane, as in business or politics, or it can be personal power such as an intense aura that radiates from them. Pluto is very secretive and your friends may be powerful people who are not generally known by the outside world, but people who work behind the scenes in some way. Pluto in the 11th house also indicates intense efforts in humanitarian pursuits that can change the world through mass movements or revolutionary designs. Pluto here can have a transforming effect on your friendships and the ways in which you and others interact.

This interpretation is from the Relationship Composite Report.

Do you and  your partner have composite Pluto in the 11th house? What's it like?