Essentially, the crime of conspiracy is committed when two or more people agree to commit a crime. They must both actually agree to the plan with the knowledge that the act they are planning is criminal (as opposed to one or both of the people pretending, or a misunderstanding), and intend to follow through at the time of their agreement. Yet because it is the agreement itself that is criminal, it is not necessary for the parties to actually follow through with their plans. Once the agreement is made, the crime is technically complete. However, in order to be prosecuted for conspiracy, at least one of the conspirators must go a little further, and take an overt step in furtherance of the plan.