SECTION 120A IPC - Indian Penal Code - Definition of criminal conspiracy

When two or more persons agree to do, or cause to be done:

1. an illegal act, or
2. an act which is not illegal by illegal means, such an agreement is designated a criminal conspiracy;

Provided that no agreement except an agreement to commit an offence shall amount to a criminal conspiracy unless some act besides the agreement is done by one or more parties to such agreement in pursuance thereof.