Natal Pluto is the sign where your Pluto was placed during birth time, and from there other houses are calculated clock-wise.
If you were born with Pluto in Virgo, then your natal house is Virgo (Kanya Rasi) and during transit, Rahu or Ketu forming conjunction (in Virgo), sextile (aspect of 60° which are Cancer and Scorpio in this case), square (aspect of 90° which are Sagittarius and Gemini here), trine (aspect of 120° which are Capricorn and Taurus here), opposition (aspect of 180° which is Pisces here) are discussed in this article.
Conjunction is transiting through same sign as in birth chart, sextile is transiting 3rd or 11th house, trine is transiting 5th or 9th house, opposition is transiting 7th house from natal sign.
Transit Rahu conjunct Natal Pluto or Transit Ketu Opposition Natal Pluto : This transit characterizes understanding of mass psychology and taking advantage of it. The native has a penetrating insight into current social trends and beliefs and their motivating forces. The native tends to involve in group activities with a basic idea to gain from these activities. The native is true opportunist.
Transit Rahu Sextile Natal Pluto or Transit Ketu Trine Natal Pluto : Insights into popular trends and beliefs and intellectual interest in reforming old values and customs characterize this transit. The native is clever in making use of popular trends and beliefs by working with groups and friends. The native can influence people and use mass psychology to meet his ends. The native has an intellectual understanding how to use the old and discarded material. Such people can be good archaeologists.
Transit Rahu or Ketu Square Natal Pluto : Aggravation, unpleasant subconscious memories and need to control negative emotional attitudes characterize this transit. Life is full of suppression and action without any valuable event, and the native is in conflict with authorities. There is difference of opinion with parents too. The native dislikes the modern ways of living and popular trends prevalent now. The native may fall into difficulties for his criticism of the prevalent trends and beliefs.
Transit Rahu Trine Natal Pluto or Transit Ketu Sextile Natal Pluto : This transit has similar effects as transit Rahu Sextile Natal Pluto or Transit Ketu Trine Natal Pluto. However it signifies insights into traditional values and intellectual awareness for the popular trends now. The native has prophetic insight into future trends and beliefs.
Transit Rahu Opposition Natal Pluto or Transit Ketu conjunct Natal Pluto : Dislike for traditional values and standards characterize this transit. The native takes an interest in the history of cultural evolution. The native tends to go deep into religious and spiritual values to bring about truth out of them. The native is master in re-using the old and discarded items for creating something new. The native is interested in items of historical value and perhaps may be a dealer in antiques. The native does not get recognition of his talents from his own nears and dears.