Plot dream meaning is explained below using 4 different sources. Each interpretation is shown with its source.

Interpretation 1 — Zolar

lucky numbers: 11-19-21-31-33-38

having a cemetery: if one is prepared, the crisis does not come prematurely.

of a, against you: wil gain sufficient retribution to pay off your debts.

to gain control: be wary of who is scheming against you.

to injure another: misfortune wil harass you until atonement is met.

of a, of land: correspondence has one main point-location, location, location.

buying: the singularity of who you are needs to be built.

selling: you do not want to expose your plan, at least not this one.

Source: Zolar’s Book of Dreams Numbers and Lucky Days Author: Zolar

Interpretation 2 — Stearn Robinson - Tom Corbett

Be prepared for a season of ups and downs with emphasis on the downs if you dreamed of being party to a plot against someone else; but if your dream concerned a plot against yourself, you can expect a pleasant improvement in your financial affairs.
Source: The Complete Guide to Interpreting Your Dreams Author: Stearn Robinson - Tom Corbett

Interpretation 3 — Internet Archive - Anonymous

Important correspondence will claim your attention; changes, surprises and a possible engagement will ensue.
Source: Mystic Dream Book Author: Internet Archive - Anonymous

Interpretation 4 — Margaret Hamilton

A literal warning
Source: Dream Dictionary Unlimited Author: Margaret Hamilton